ICSE

ICSE Class 9 Biology Sample Question Paper 5 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) The book in which Robert Hooke’s discovery about cell was published.
(ii) Smallest known cell.
(iii) The kind of tissue found as gritty masses in the skin of pears.
(iv) The large, colourful leaf-like structure in Bougainvillea.
(v) A distinct white oval scar mark on concave side of seed.
Answer:
(i) Micrographia
(ii) Mycoplasma
(iii) Scierenchyma
(iv) Bract
(v) Hilum

(b) Choose the correct answer from the options given below :
(i) The hierarchy of classification of various levels of diversity is :
(a) Kingdom, phylum, order, class, genus, family, species
(b) Phylum, order, class, kingdom, genus, species, family
(c) Order, kingdom, phylum, family, genus, species, class
(d) Kingdom, phylum, class, order, family, genus, species
Answer:
(d) Kingdom, phylum, class, order, family, genus, species

(ii) Which bacteria is rod-shaped ?
(a) Coccus
(b) Vibrio
(c) Bacillus
(d) Spirillum
Answer:
(c) Bacillus

(iii) The phylum in which largest number of animals are present is :
(a) Mollusca
(b) Annelida
(c) Arthropoda
(d) Echinodermata
Answer:
(c) Arthropoda

(iv) WHO was established in the year and headquarters are located in……………..
(a) 1864, Geneva
(b) 1948, Geneva
(c) 1948, Paris
(d) 1864, Denmark
Answer:
(b) 1948, Geneva

(v) A disease widely spread worldwide is known as :
(a) Endemic
(b) Epidemic
(c) Sporadic
(d) Pandemic
Answer:
(d) Pandemic

(c) Name the kingdom/phylum/class of the following organisms :
(i) Sycon
(ii) Mosses
(iii) Sea anemone
(iv) Millipedes
(v) Scorpions
Answer:
(i) Kingdom – Anirnalia, phylum – Ponfera, class – Calcarea
(ii) Kingdom – Plantae, phylum – Bryophyta, class – Bryopsida
(iii) Kingdom – Animalia, phylum – Cnidaria, class – Anthozoa
(iv) Kingdom – Animalia, phylum – Arthropoda, class – Myriapoda
(v) Kingdom – Animalia, phylum – Arthropoda, class – Arachnida

(d) Fill in the blanks :
(i) ……………. forms spindle fibres with asters.
(ii) …………….and ……………. are called tracheary elements of xylem.
(iii) The condition when pollen of a flower of another plant of the same species fall on stigma is called …………….
(iv) On the basis of endosperm, seeds are classified as ……………. and …………….
(v) ……………. was first genetically engineered product produced from bacteria E. coli.
Answer:
(i) Centrosomes
(ii) Tracheids and vessels
(iii) Allogamy
(iv) Albuminous and ex-albuminous seeds
(v) Hormone insulin

(e) Differentiate between the following based on instructions given in brackets.
(i) Vibrio cholerae and streptococcus (shape)
(ii) Azotobacter and rhizobium (where they are found)
(iii) Incisors and canines (number present in humans)
(iv) Assimilation and defaecation (definition)
(v) Cranium and vertebral column (number of bones present)
Answer:

(f) Statements given below are incorrect. Write the correct form of the statements by changing first or last word only.
(i) Complete loss of pigmentation of skin is known as vitiligo.
(ii) The winter sleep in case of frogs is known as aestivation.
(iii) Air that can be forcibly expelled out after normal expiration is called vital capacity.
(iv) Anaerobic respiration is also called oxybiotic respiration.
(v) Respiration is a physico-chemical process.
Answer:
(i) Complete loss of pigmentation of skin is known as albinism.
(ii) The winter sleep in case of frogs is known as hibernation.
(iii) Air that can be forcibly expelled out after normal expiration is called expiratory reserve volume.
(iv) Aerobic respiration is also called oxybiotic respiration.
(v) Burning is a physico-chemical process.

(g) Match the items given in column I with the most appropriate ones in column II and rewrite the correct matching pairs.

Answer:

(h) Study the diagram given below and answer the following questions :

(i) Identify the organism. Give its scientific name.
(ii) Name the phylum to which it belongs. Give some characteristic features of organisms belonging to the phylum named by you.
(iii) Label parts 1-4.
(iv) What is the function of part 2 ?
(v) Give the economic importance of this organism.
Answer:
(i) It is an Indian earthworm. Scientific name is Pheretimaposthuma.
(ii) It belongs to phylum Annelida. Some characteristic features of the organisms belonging to this phylum are :

• Their body is cylindrical and divided into ring-like segments.
• They have well- developed digestive system with alimentary canal open at mouth and anus.
• They have a true body cavity.

(iii) 1-Mouth, 2-Clitellum, 3-Body segment, 4-Anus.
(iv) Clitellum plays an important role in reproduction process.
(v) Some economic importance of this organism are :
1. They help in loosening and aeration of soil.
2. It increases the fertility of the soil by interchanging top layer of soil with inner layers.
3. It is used in vermiculture.
4. Its excreta is rich in nitrogenous matter which is an essential component for plant’s growth.

Section-II
(Attempt any four questions from this section)

Question 2.
(a) Give the exact location of the following :
(i) Adipose tissue
(ii) Cardiac muscles
(iii) Hypocotyl
(iv) Parotid glands
(v) Foramen magnum
Answer:
(i) Adipose tissue is a specialized fat storing tissues found under skin, around kidneys, eyeball etc.
(ii) Cardiac muscles are found in the walls of the heart.
(iii) Hypocotyl is the region of the axis below the cotyledons of seeds.
(iv) Parotid glands are located in front of and beneath each ear.
(v) Foramen magnum is a large hole on the back part of cranium.

(b) Study the figure given below and answer the following questions :

(i) Identify the structure. Label the parts 1-6.
(ii) What is the main difference between male and female skeleton ?
(iii) Name the bones present in hindlimbs with their number.
(iv) How many bones are present in pelvic girdle ?
(v) Give the two main divisions of skeleton.
Answer:
(i) It is the front portion of pelvis.
1—Acetabulum, 2—Ischium, 3—Pubis, 4—ilium, 5—Sacrum, 6-Coccyx.
(ii) Male skeleton is larger and heavier than female. The pelvis in female skeleton is wider and trough-shaped.
(iii) Femur—2, tibia-2, fibula—2, ta rsals—1 4, patella-2, metatarsals—10, phalanges—28. So there are total 60 bones in our hindlimbs.
(iv) Our pelvic girdle is made up of two hip bones. Each hip bone is made up of three bones— ilium, ischium, pubis.
(v) Axial skeleton which includes skull, vertebral Column, ribs, sternum and appendicuiar skeleton includes bones of Limbs and girdles.

Question 3.
(a) Give two points of differences between the following pairs :
(i) Kwashiorkor and Marasmus
(ii) Prokaryotes and Eukaryotes
(iii) Pisces and Amphibians
(iv) Flat worm and Roundworm
(v) Glycolysis and Kreb’s cycle
Answer:

(b) Study the below figure and answer the following questions :

(i) Identify the muscular tissue A, B and C.
(ii) Give some characteristic features of tissue A.
(iii) State the location of tissue B.
(iv) Give some characteristic features of tissue C.
(v) Give the location of tissue C.
Answer:
(i) A- cardiac muscles, B- skeletal or striated muscles, C- smooth or unstriated muscles.
(ii) They are involuntary in function. They are striated, uninucleated, short and branched muscles.
(iii) They are found in arms, legs, face, neck etc.
(iv) They are involuntary in function. They are spindle shaped/slender cells tapered at both ends. They are uninucleated.
(v) They are found in walls of intestine, urinary bladder, uterus, lining of blood vessels etc.

Question 4.
(a) Give reasons :
(i) Composting is a useful method contributing in crop farming.
(ii) Abnormally a large number of WBCs in the blood are usually an indication of some infection in our body.
(iii) Eating places should be free from flies.
(iv) We cannot hold our breath forcibly for a longer time.
(v) Food tube is partially collapsed when not in use
Answer:
(i) Composting is the process of putting biodegradable wastes in a compost pit to decay, so that by the action of microbes, it gets converted into manure which can be used in agricultural lands to grow crops or plants. So, composting is a very useful method contributing in crop farming.

(ii) When any foreign particles like disease-causing microbes enter into our body, WBCs immediately squeeze out of walls of blood capillaries and reach the site of infection and fight against the germs. Thus, abnormally a large number of WBCs in the blood are usually an indication of some infection in our body.

(iii) Flies are main carriers of germs as they sit on excreta which cause various diseases like cholera, typhoid, dysentery etc. If food will remain uncovered, the flies carrying these disease-causing germs will sit on our food, thus contaminating it and when we consume this contaminated food, we may suffer from various diseases. So, eating places should be free from flies.

(iv) The breathing process is involuntary i.e., not under the control of our will. To some extent we can increase or decrease the rate of breathing but after that we can not hold our breathe forcibly. Our respiratory centre is located in medulla oblongata which is stimulated by carbon dioxide concentration in our body. If we hold our breathe, carbon dioxide gas cannot be released to outside, so its concentration increases which will stimulate our respiratory centre.

(v) Food wall or oesophagus is soft so when there is no peristalsis process, it gets collapsed.

(b) Study the diagram given below and answer the following questions :

(i) Define the process shown in the figure above.
(ii) In which part of the alimentary canal does this process occurs ?
(iii) Is any enzyme secreted by the structure shown in above figure ? If yes, name it.
(iv) Sometimes reverse of the process named by you in Q. (i) occurs. Name the process and state why it occurs ?
(v) Name a structure which prevents backflow of food from :
1. Stomach to oesophagus.
2. Duodenum to stomach.
Answer:
Peristalsis is a wave of constriction caused by circular muscles of gut which pushes the food down into stomach.
It occurs in all regions of gut mainly in oesophagus.
No, oesophagus does not secrete any enzyme.
Antiperistalsis occurs when stomach is disturbed or overloaded where reverse wave of muscular contraction occurs causing throwing of food contents out from the mouth.
1. Cardiac sphincter
2. Pyloric sphincter.

Question 5.
(a) Define the following terms :
(i) Digestion
(ii) Sunstroke
(iii) Cellular respiration
(iv) Spawning of mushroom
(v) Bioweapons
Answer:
(i) Digestion is a process of conversion of complex food substances into smaller, simpler, diffusible molecules so that they can be absorbed and assimilated by our body.

(ii) Sunstroke is a condition in which sweat production is unable to keep pace with its evaporation in very hot winds, resulting in rise of body temperature which sometimes may prove fatal.

(iii) The complex chemical reactions which occurs inside a cell to release energy from glucose is called cellular respiration.

(iv) Spawning is the process of introduction of mushroom seed consisting of mycelium of selected type of mushroom into compost from which mushrooms will grow.

(v) Bioweapons are harmful biological agent like bacteria, virus, fungi which can cause diseases and may take epidemic shape killing living organisms. Example—Anthrax bacteria is used as bioweapons.

(b) Study the figure below and the answer the following questions :

(i) Identify the organelle.
(ii) Label its parts.
(iii) Name the important pigment present in this structure.
(iv) Name the other types of plastids. Describe them.

Question 6.
(a) Study the figure below and answer the following questions :

(i) Identify the figure.
(ii) Label the parts 1-10.
(iii) Whatdoyoumeanbytriplefusian?
(iv) Define double fertilization.
(v) What is the fate of following after fertilization:
1. Calyx
2. Integuments
3. Eggcell
4.Ovary
5.Ovule

(b) Give the alternative nana of the following vitamins:
(i) Vitamin A
(ii) Vitamin B₁₂
(ill) Vitamin C
(lv) Vitamin D
(y) VitaminK
(vi) VitaminE
(vil) Vitamin B₃
(viii) Vitamin B₅
(ix) Vitamin B₉
(x) Vitamin B₂

Question 7.
(a) Give any two characteristic features of the following:
(I) Mammals
(li) Moliusca
(iii) Gymnosperms
(iv) Thallophyta
(y) Fungi

(b) Study the figure below and answer de following questions:

(i) In how many flasks the different plant parts are kept in observation ?
(ii) What is the purpose of keeping a test tube containing lime water in each flask ?
(iii) In which test tubes will lime water turn milky ?
(iv) What is the purpose of set-up ?
(v) What conclusion do you draw from this experiment ?

ICSE Class 9 Biology Question Papers with Answers

ICSE Class 9 Biology Sample Question Paper 6 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) An amoeboid cell in human body.
(ii) The condition in which filaments of stamens are united in several groups.
(iii) The category of plant tissues that have lost their ability to multiply.
(iv) Three cells inside embryo sac found near the micropylar end.
(v) The type of germination seen in maize grain.
Answer:
(i) WBCs
(ii) Polyadelphous
(iii) Permanent tissues
(iv) 1 egg cell, 2 synergids
(v) Hypogeal germination

(b) Choose the odd one out from the following terms given and name the category to which the others belong :
(i) Formalin, Bordeaux mixture, Lime, Mercurochrome.
(ii) Fly ash, Baggasse, Cow dung, Fertilizers.
(iii) Malaria, Sleeping sickness, Filariasis, Amoebic dysentery.
(iv) Cholera, Typhoid, Hepatitis, Dysentery, Tuberculosis.
(v) Acne, Pimples, Blackheads, Vitiligo.
Answer:

(i) Odd : Mercurochrome
Category : Disinfectants

(ii) Odd : Fly ash
Category : Agricultural wastes

(iii) Odd: Filariasis
Category : Diseases caused by protozoa

(iv) Odd : Tuberculosis
Category : Waterborne diseases

(v) Odd: Vitiligo
Category : Problems related to sebaceous glands.

(c) Fill in the blanks :
(i) Knee joint is protected by outer ……………..
(ii) The vibrations of …………….. in human beings produce sound.
(iii) …………….. is the largest gland of our body.
(iv) …………….. and …………….. are water soluble vitamins.
(v) …………….. is the most popular variety of mushroom grown in India.
Answer:
(i) Fibrous capsule
(ii) Vocal cords
(iii) Liver
(iv) Vitamin B, vitamin C
(v) Agaricus bisporous

(d) Choose the correct answer from each of the four options given below :
(i) The hardness of bone is due to:
(a) Calcium
(b) Magnesium
(c) Potassium
(d) Sodium
Answer:
(a) Calcium

(ii) An organelle which lacks a membrane is:
(a) Mitochondria
(b) Golgi complex
(c) Endoplasmic reticulum
(d) Ribosomes
Answer:
(d) Ribosomes

(iii) Which one of the following is a characteristic feature of an anemophilous flower?
(a) Pollen grains have specific gravity equal to that of water.
(b) Pollen grains are light, dry and smooth.
(c) Pollen grains are sticky.
(d) Flowers are large, brightly coloured and produce nectar.
Answer:
(b) Pollen grains are light, dry and smooth

(iv) Alcohol is produced during the process of :
(a) Oxybiotic respiration
(b) Combustion
(c) Fermentation
(d) Kreb’s cycle
Answer:
(c) Fermentation

(v) During respiration, there is :
(a) Gain in dry weight
(b) No change in weight
(c) Conversion of ADP to ATP
(d) Loss in dry weight
Answer:
(d) Loss in dry weight

(e) Given below are five sets of terms. In each case, arrange and rewrite each set so as to be in logical sequence :
(i) Axon endings, Dendrites, Axon, Synapse, Cyton, Nissl granules, Nodes of Ranvier.
(ii) Pollen tube, Stigma, Pollen grains, Anther, Embryo sac, Micropyle.
(iii) Sporangiophores, Spores, Mycelium, Sporangium, Substrate.
(iv) Food pipe, Duodenum, Buccal cavity, Ileum, Stomach, Rectum.
(v) Mandible, Sternum, Cranium, Phalanges, Patella, Pelvis, Acetabulum, Femur.
Answer:
(i) Dendrites, Cyton, Nissl granules, Axon, Nodes of Ranvier, Axon endings, Synapse.
(ii) Anther, Pollen grains, Stigma, Pollen tube, Micropyle, Embryo sac.
(iii) Spores, Substrate, Mycelium, Sporangiophores, Sporangium.
(iv) Buccal cavity, Food pipe, Stomach, Duodenum, Ileum, Rectum.
(v) Cranium, Mandible, Sternum, Pelvis, Acetabulum, Femur, Patella, Phalanges.

(f) Statements given below are incorrect. Write the correct form of statements in each case :
(i) Nitrosomonas convert nitrites into nitrates.
(ii) Bacteria reproduces by budding.
(iii) Reptiles have four chambered heart.
(iv) Annelids have an exoskeleton made up of chitin.
(v) Respiration is an anabolic process.
Answer:
(i) Nitrobacter convert nitrites into nitrates.
(ii) Bacteria reproduces by fission.
(iii) Reptiles have three chambered heart.
(iv) Arthropods have an exoskeleton made up of chitin.
(v) Respiration is a catabolic process.

(g) Give one important function of the following :
(i) Scrubbers
(ii) Diaphragm
(iii) Cerumen
(iv) Glenoid cavity
(v) Amylopsin
Answer:
(i) Scrubbers are devices which remove gaseous and particulate air pollutants.
(ii) Diaphragm separates thoracic cavity from abdominal cavity. The contraction and relaxation of diaphragm helps in breathing mechanism.
(iii) Cerumen is a wax-like substance which lubricates and protects the eardrum from germs and dust particles. It is secreted by ceruminous glands.
(iv) Pectoral girdle contains a cup-shaped cavity called glenoid cavity into which head of humerus fits.
(v) Amylopsin, also called pancreatic amylase, acts upon starch and converts it into maltose.

(h) Study the diagram given below and answer the following :

(i) Identify the figure.
(ii) What are true ribs and floating ribs ?
(iii) Label the parts indicated in diagram.
(iv) Name the cartilage and vertebrae present in this structure.
(v) What is the main function of this structure ?
Answer:
(i) It is rib cage or bony cage.
(ii) True ribs are attached to sternum in front with help of cartilage. They are seven pairs.
(iii) Floating ribs are not attached to the sternum and they are 11^th and 12^th pair of ribs. 1-Vertebral column, 2-Stemum, 3-Ribs, 4-Cartilage.
(iv) Hyaline cartilage and thoracic vertebrae are present.
(v) It protects our delicate organs like heart and lungs.

Section – II
(Attempt any four questions from this section)

Question 2.
(a) Answer the following briefly :
(i) Give few importance of nutrition.
(ii) Give major steps of mushroom cultivation.
(iii) Give two bacterial diseases in plants and animals each.
(iv) Give two rules in writing scientific names of living organisms.
(v) Give an equation representing :
1. Anaerobic respiration in yeast.
2. Anaerobic respiration in muscles.
Answer:
(i) Importance of nutrition :
1. It is required for growth as it builds up new cells.
2. It helps in repair of worn out or injured cells.
3. It provides energy to carry out various life processes.
4. It provides raw materials for synthesis of enzymes, hormones, milk, sweat etc.
5. It protects us from disease and infection.

(ii) The major steps of mushroom cultivation are :

1. Composting : Here, compost is prepared by using paddy or wheat straw, manure, fertilizer etc.
2. Spawning: Mycelium of selected type of mushroom is introduced into compost.
3. Casing : Soil is spread over compost.
4. Cropping and harvesting : Mycelium grows and tiny mushrooms are formed. When they are fully grown, they are taken out.
5. Preservation : They are preserved using various techniques.

(iii) Bacterial disease in plants are bacterial blight of cowpea, black rot of cauliflower. In animals, they are anthrax and tuberculosis.

(iv) Two rules in writing scientific names of living organisms are :

1. They are written in italics when in print and should be underlined when written in hand.
2. The first letter of genus should be capital letter and species should be small letter.

(v) C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂ + 2 ATP
C₆H₁₂O₆ → Lactic acid + 2 ATP + Heat/energy

(b) Study the figure below and answer the following questions :

(i) Identify the parts labelled in the figure.
(ii) Where does germination of pollen grains occur and how ?
(iii) What is the function of part 1 and 2 ?
(iv) How does the male nucleus reach the female gamete inside embryo sac ?
(v) Name the covering of pollen grain.
Answer:
(i) 1-Generative nucleus, 2-Tube nucleus.

(ii) Germination of pollen grains occurs on the stigma only if pollen grains have fallen on stigma of the same plant species. Stigma secretes some sugary substances which stimulates the germination of pollen grains.

(iii) Generative nucleus divides to form two male gamete nuclei/sperm nuclei. Tube nucleus directs the growth of pollen tube through style to reach the embryo sac present in ovary and then it disintegrates.

(iv) Pollen tube carrying two sperm nuclei and tube nucleus passes through the stigma and style by dissolving the tissues with the help of enzymes and finally reaches the ovule containing embryo sac. It pushes through micropyle and reaches the embryo sac containing female gamete.

(v) Pollen grain is covered with double layered wall-outer exine and inner intine.

Question 3.
(a) Differentiate between the following :
(i) Self pollination and Cross pollination
(ii) Androecium and Gynoecium
(iii) Epithelial tissue and Connective tissue
(iv) Monocots and Dicots
(v) Photosynthesis and Respiration
Answer:

(b) Study the figure below and answer the following questions :

(i) What does the experiment demonstrate ?
(ii) Why level of mercury in test tube B falls after few days ?
(iii) Wltich gas is liberated by this process and how can you prove its presence ?
(iv) What is a control in this experiment and why ?
Answer:
(i) It demonstrates anaerobic respiration in germinating seeds.
(ii) After few days, the mercury level falls off because due to anaerobic respiration carbon dioxide is produced which will occupy the space in the top of test tube and mercury level falls down.
(iii) Carbon dioxide gas is produced. If we will introduce KOH solution in test tube B, KOH will float on the surface of mercury which will absorb carbon dioxide gas and again mercury level will rise up in the test tube.
(iv) Test tube A is a control as boiled, sterilized seeds are taken which cannot undergo respiration either aerobically or anaerobically.

Question 4.
(a) Give reasons :
(i) Scientific names of living organisms are considered better than their common names.
(ii) Every living room in the house should get direct sunlight at least for a short time.
(iii) Tinned and sealed foods are not always safe to eat.
(iv) Protoplasm can not be analysed chemically.
(v) Maximum food is absorbed in ileum part of small intestine.
Answer:
(i) People from different countries with different languages use different names for a particular organism. So it creates confusion, hence to avoid any confusion it is better to assign a scientific name to living organisms than their common names.

(ii) Direct sunlight helps in killing the microbes like bacteria or fungi present in the room. Thus, it keeps the air inside room clean and pure, making healthy environment.

(iii) Sometimes in tinned and canned foods a special bacteria is found which causes severe food poisoning called botulism. Thus, they are not always safe to eat.

(iv) The chemical composition of protoplasm is very complex and as soon as it is removed from an organism, it ceases, so it cannot be analysed chemically.

(v) Ileum part of small intestine is very long and it provides more surface area for absorption of food. Villi which are finger-like projections in ileum are present numerously thus increase the surface area for absorption. Thus, maximum food is absorbed in ileum.

(b) Study the diagram given below and answer the following questions :

(i) Name the process shown in the diagram above.
(ii) Laber the parts 1-4.
(iii) What does the arrow 5 and 6 indicate ?
(iv) Name the corresponding structure found in plants.
(v) Give the percentage of oxygen and carbon dioxide present in inhaled and exhaled air.
Answer:
(i) Gaseous exchange in alveolus.
(ii) 1-Wall of alveolus, 2-RBC, 3-Wall of blood capillary, 4-Plasma
(iii) 5- Oxygen diffuses from alveoli to blood capillary.
6- Carbon dioxide diffuses out from blood capillary to alveoli.
(iv) Stomata through which exchange of gases occurs.
(v)

Question 5.
(a) Complete the blanks in below figure :

Answer:
1. R.H. Whittaker
2. Monera
3. Plantae
4. Bryophyta
5. Pteridophyta
6. Monocots
7. Dicots
8. Vertebrates
9. Invertebrates
10. Eubacteria

(b) Study the figure given below and answer the following questions

(i) Name the accessory digestive glands shown in figure.
(ii) Name the secretion produced by part labelled 1 and its function.
(iii) Name the parts of structures labelled 2 and 3.
(iv) Identify the vestigial organ from the above figure and mention its exact location.
(v) Name the enzymes found in secretion secreted from gland labelled 4.
Answer:
(i) Liver, pancreas, salivary glands.
(ii) Part 1 is liver which produces bile and makes the medium of small intestine alkaline so that enzymes secreted by pancreas and small intestine can function properly. It also emulsifies fats so that fat digesting enzymes can act upon it properly.
(iii) Part 2 is small intestine which consists of duodenum, jejunum, ileum.
Part 3 is large intestine which consists of caecum, colon, rectum.
(iv) Vermiform appendix which is a worm-shaped tube arises from blind end of caecum.
(v) Enzymes present in part 4 i.e., pancreas are amylopsin, trypsin, steapsin.

Question 6.
(a) Give exact location of the following :
(i) Caecum
(ii) Submandibular glands
(iii) Bone marrow
(iv) Intervertebral disc
(v) Sebaceous glands
Answer:
(i) Caecum is a small blind pouch-like structure situated at the junction of small intestine and large intestine.
(ii) Submandibular glands lie close to the inner side of the lower jaw on each side.
(iii) Bone marrow is found in the cavity of long bones like femur, humerus etc.
(iv) Invertebral disc is a pad of cartilage between two vertebrae.
(v) Sebaceous glands are branched glands found in dermis region of skin and open into hair follicle and sometimes directly to outside.

(b) Study the below figure and answer the following questions :

(i) Name the organism.
(ii) Is it unicellular eukaryotic or multicellular eukaryotic organism ?
(iii) To which kingdom does it belongs ?
(iv) Give examples of some other organisms belonging to this category.
(v) Name the type of nutrition found in the organism shown in figure.
Answer:
(i) It is a chlamydomonas.
(ii) It is unicellular eukaryotic organism.
(iii) It belongs to kingdom Protista.
(iv) Euglena, paramecium, amoeba.
(v) Autotrophic nutrition.

Question 7.
(a) Complete the following paragraph by filling in the appropriate term.
Plant tissues are basically of two types ………….. (i) and ………….. (ii)…………… (iii) tissue is found in growing points of a plant. Permanent tissues are of three types ………….. (iv), ………….. (v) and ………….. (vi). Xylem and
phloem are examples of ………….. (vii) tissue ………….. (viii) ………….. (ix) and ………….. (x) are examples of supporting tissue.
Answer:
(i) Meristematic
(ii) Permanent
(iii) Meristematic
(iv) Protective
(y) Supporting
(vi) Conducting
(vii) Conducting
(viii) Parenchyma
(ix) Collenchyma
(x) Scierenchyma

(b) Study the figure given below and answer the following questions :

(i) Identify the cell. Give reason in support of your answer.
(ii) Name the only organelle present in animal cells. What is its role ?
(iii) What is the function of organelle labelled 1, 2 and 3 ?
(iv) How can you differentiate between prokaryotic cell and eukaryotic cell ?
(v) Draw a labelled diagram of a prokaryotic cell. Name the kingdom in which they are placed.
Answer:
(i) It is plant cell as it contains cell wall. chioroplast and a large, centrally placed vacuole.

(ii) Centrosome. It initiates and regulates cell division and forms spindle fibres with the help of asters.

(iii) Part 1 is ribosomes which help in protein synthesis.
Part 2 is golgi complex which secretes enzyme, hormones and forms acrosome of sperm.
Part 3 is vacuole which provides turgidity to cell and stores water, food, waste substances etc.

(iv)

(v) They are placed in kingdom Monera.

ICSE Class 9 Biology Question Papers with Answers

ICSE Class 9 Biology Sample Question Paper 10 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) Membrane surrounding the vacuole.
(ii) The kind of animal tissue in which cells are flat, cuboidal or columnar forming protective layer.
(iii) A seed with folded plumule leaves.
(iv) The constituent of food which changes the colour of ammonium hydroxide first from white to yellow and then yellow to orange.
(v) The muscles which raise the weight of the body on the toes.
Answer:
(i) Tonoplast
(ii) Epithelial tissue
(iii) Bean seed
(iv) Protein
(v) Gastrocnemius muscle

(b) State whether the following statements are true or false. If false, rewrite the statements in the correct form :
(i) When a flower arises in the axil of a leaf-like structure, the structure is known as bract.
(ii) The presence of a hood covering the stigma is a condition of heterostyly in flowers.
(iii) Tegmen is the outermost layer of the seed.
(iv) The scientific name of house crow is Corvus macrorhynchos.
(v) Cataract is an example of degenerative disease.
Answer:
(i) True
(ii) False, The presence of a hood covering the stigma is a condition of herkogamy in flowers.
(iii) False, Testa is the outermost layer of the seed.
(iv) False, The scientific name of house crow is Corvus splendens.
(v) True

(c) Match the items of column I with those in column II and rewrite the correct matching pairs.

Answer:

(d) Identify the odd term in each set and classify the rest under one category.
(i) Town area committees, Municipal Corporations, Municipalities, Red Cross.
(ii) BCG, DT, DPT, ATP.
(iii) Syphilis, Gonorrhea, Leprosy, Herpes.
(iv) Trachea, Bronchioles, Alveoli, Oesophagus.
(v) Scapula, Sternum, Vertebrae, Mandible.
Answer:
(i) Odd : Red cross
Category: Local bodies

(ii) Odd: ATP
Category : Names of vaccines

(iii) Odd: Leprosy
Category : Sexually transmitted diseases

(iv) Odd : Oesophagus
Category : Parts of respiratory tract

(v) Odd : Scapula
Category : Bones of axial skeleton

(e) Fill in the blanks :
(i) Joint between bones of wrist is an example of joint.
(ii) Liver produces only in embryo.
(iii) is popularly called fruit sugar.
(iv) is the lowest level in biological classification.
(v) is an example of bird pollinated flower.
Answer:
(i) Gliding
(ii) Red Blood Cells
(iii) Fructose
(iv) Species
(v) Canna

(f) Choose the correct answer from each of the four options given below :
(i) Features that help the bird to maintain constant body temperature is :
(a) Digits
(b) Wings
(c) Pneumatic bones
(d) Feathers
Answer:
(d) Feathers

(ii) Which of the following components of phloem is absent in monocot stem ?
(a) Sieve tubes
(b) Companion cells
(c) Phloem parenchyma
(d) Phloem fibres
Answer:
(c) Phloem parenchyma

(iii) Tissue found in area of regular wear and tear is :
(a) Simple squamous epithelium
(b) Stratified squamous epithelium
(c) Cuboidal epithelium
(d) Columnar epithelium
Answer:
(b) Stratified squamous epithelium

(iv) Which one of the following characteristics is found in all fungi but not in all bacteria ?
(a) Aerobic respiration
(b) Cell wall
(c) Spore formation
(d) A long circular DNA lying loose in the cytoplasm
Answer:
(c) Spore formation

(v) Which one of the following pairs of types of teeth performs one common function as stated against it ?
(a) Incisors, canines — Holding
(b) Canines, premolars — Tearing
(c) Premolars, molars — Grinding
(d) Molars, incisors — Tearing
Answer:
(c) Premolars, molars – Grinding

(g) Given below are five sets of terms. Rewrite the terms in correct order so as to be in a logical sequence beginning with the term that is underlined :
(i) Embryo, 1st male gamete, zygote, egg cell, micropvle.
(ii) Preservation, casing, composting, spawning, cropping and harvesting.
(iii) Pulp cavity, dentine, periodontal membrane, enamel.
(iv) Mandible, pelvis, cervical vertebrae, patella, acetabulum.
(v) Stamens, petals, epicalyx, sepals, pistils, receptacle, stalk.
Answer:
(i) 1st male gamete, micropyle, egg cell, zygote, embryo.
(ii) Composting, spawning, casing, cropping and harvesting, preservation.
(iii) Enamel, dentine, pulp cavity, periodontal membrane.
(iv) Mandible, cervical vertebrae, pelvis, acetabulum, patella.
(v) Stalk, receptacle, epicalyx, sepals, petals, stamens, pistils.

(h) Study the diagram given below and answer the following questions :

(i) It is a bony fish which belongs to class pisces, phylum chordata and kingdom Animalia.

(ii) They breathe by means of gills, have streamlined body covered with scales and have fins. They are cold blooded i.e., temperature of body directly fluctuates with temperature of environment.

(iii) They are mainly of two types :

• Cartilaginous fishes whose skeleton is made up of cartilage. Gill slits are exposed without gill cover. Examples-sharks, dogfish etc.
• Bony fishes whose skeleton is made up of bones. Gill slits are covered with operculum.

(iv) No, it is cold blooded animal.

Section – II
(Attempt any four questions from this section)

Question 2.
(a) Write two points of differences between the following pairs:
(î) Thallophyta and Bryophyta
(ii) Aerobic respiration and Anaerobic respiration
(iii) Bean seed and Maize grain
(iv) Entomophilous flowers and Anemophilous flowers
(v) Axial skeleton and Appendicular skeleton
Answer:

(b) Study the figure given below and answer the following questions:

(i) Identify the figure.
(ii) Label the parts as indicated in figure.
(iii) What are the cells of this structure known as and how are they arranged ?
(iv) What is the chemical composition of this structure ?
(v) What is the membrane of this structure known as ?
Answer:
(i) The figure shows an enlarged bone cell.
(ii) 1-Haversian canal, 2-Osteocyte, 3-Canaliculi.
(iii) The living cells are known as osteocytes and they are arranged in the form of concentric rings embedded in a ground matrix in which collagen fibres and mineral salts are deposited.
(iv) It consists of salts of calcium and phosphorus, collagen fibres.
(v) Periosteum

Question 3.
(a) Give the exact location of the following :
(i) Pylorus
(ii) Cambium
(iii) Centrosome
(iv) Transverse process
(v) Hair root
Answer:
(i) Opening of the stomach into intestine is pylorus.
(ii) Cambium is situated below the bark of the stem.
(iii) It is a region surrounding the centrioles located near nucleus.
(iv) They are thick sideward projections from the neural arches of a vertebrae.
(v) Hair root is the part of hair embedded within the dermis.

(b) With regards to respiratory system of human beings, answer the following :
(i) How will you prove that exhaled air contains water?
(ii) How is the respiratory passage kept free of dust particles?
(iii) Why is the percentage of oxygen content less and carbon dioxide content more in exhaled air?
(iv) How does diaphragm help in inhalation and exhalation ?
Answer:
(i) When we breathe gently upon a cold surface like glass, water droplets appear on the surface which proves that exhaled air contains water.

(ii) The hair present in the nostrils prevent dust and other large particles from entering the respiratory tract. The mucous secretion in nasal chambers entraps the harmful particles. In this way, respiratory passage is kept free of dust particles.

(iii) Oxygen which we breathe in is used up by tissues for oxidation of glucose to release energy in the form of ATP to carry out metabolic activities. So, the percentage of oxygen content in exhaled air [16.4%] is less as compared to inhaled air [20.96%]. Tissues release carbon dioxide due to oxidation of glucose which is released out through exhaled air [4.0%]. Hence, carbon dioxide concentration is more in exhaled air.

(iv) During inhalation diaphragm contracts and flattens, thus increases the chest cavity lengthwise. Pressure decreases inside lungs, drawing air inside. During exhalation, diaphragm is relaxed which moves towards base of lungs and becomes dome-shaped, thus reducing the volume of thoracic cavity and the air is forced out of the lungs.

Question 4.
(a) Define the following :
(i) Expiratory reserve volume
(ii) Prophylaxis
(iii) Deamination
(iv) Peristalsis
(v) Pollination
Answer:
(i) Air that can be forcibly expelled out after normal expiration is called expiratory reserve volume.

(ii) The practice of artificially introducing the germs or germ substance into the body for developing resistance to a particular disease is called prophylaxis.

(iii) The process of breaking of excess amino acids in the liver where nitrogen containing amino group is removed and converted to urea is called deamination.

(iv) Peristalsis is the wave of constrictions caused by circular muscles of gut by which the food, in the form of bolus, passes through all regions of gut.

(v) Pollination is the transfer of pollen grains from the anther to stigma of same flower or different flower in same plant or different plant of same species.

(b) Study the figure of a bone given below and answer the following :

(i) Identify the figure.
(ii) Label the parts indicated in diagram.
(iii) To which part of skeleton does this structure belongs to ?
(iv) What is the main function of this bone ?
(v) What is the main function of the glenoid cavity ?
Answer:
(i) Pectoral girdle
(ii) 1-Spine, 2-Humerus, 3-Scapula, 4-Clavicle.
(iii) Appendicular skeleton
(iv) It helps in articulation of humerus i.e., bone of forelimbs to axial skeleton.
(v) The outer apex has a large cup-shaped glenoid cavity into which fits the round head of humerus.

Question 5.
(a) Give the exact function of the following :
(i) Endoplasmic reticulum
(ii) Lymph
(iii) Proteins
(iv) Cement
(v) Muscle
Answer:
(i) It is a supportive framework for the cell. It synthesizes and transport proteins and fats.
(ii) Lymph mainly consists of WBCs which play an important role in immune response. It absorbs fats and fatty acids from digestive system.
(iii) Proteins provide chemical material for growth and repair of body cells and tissues. During time of emergency, they get oxidised to release energy.
(iv) Cement is a bone-like structure which covers and fixes the root in position.
(v) Muscle provides all movements in body, cover the skeletal framework and give shape to the body. It helps to maintain body posture while sitting, standing or walking.

(b) With reference to digestive system of our body, answer the following questions :
(i) Name the digestive gland present in mouth. State its function also.
(ii) Give two important functions of the secretion secreted by the gland named by you in Q.(i) above.
(iii) Draw a labelled diagram of a tooth with two roots.
(iv) Name the following parts of a tooth :
1. Exposed above the gum.
2. Soft connective tissue contained in the central space of the tooth.
3. Slight constriction between root and crown.
4. Hard substance making the covering of the tooth.
Answer:
(i) Salivary glands. It secretes saliva which plays an important role in digestion and has many other important functions.

(ii) Saliva contains an enzyme ptyalin which acts upon starch and converts into maltose. It moistens

(iii)

(iv) 1. Crown
2. Pulp
3. Neck
4. Enamel

Question 6.
(a) Answer the following questions briefly :
(i) List two methods of controlling houseflies.
(ii) Give two advantages of incineration process and also state two precautions that should be taken during this process.
(iii) Describe about the parts of a hair.
(iv) How is liver an important organ in our body ?
(v) Why is spore formation in bacteria not considered a form of reproduction ?
Answer:
(i) 1. Houseflies can be controlled by spraying DDT and insecticides in houses and breeding places.
2. Food should be kept covered and well protected from flies.

(ii) Two advantages of incineration process are :
1. The ash left over occupies much less landfill space.
2. Residual ash in the bottom can be used for recovery of some metals.
Two precautions that should be taken during incineration are :
1. It should be carried out at very high temperature.
2. Incinerators should be installed away from residential areas.

(iii) A hair consists of three parts :
1. Hair shaft, which projects from skin and extends slightly below the surface of epidermis.
2. Hair root, which is embedded within dermis.
3. Hair bulb, which is the lowest expanded part which contains hair papilla with capillary blood supply.

(iv) Liver performs major functions in our body like :
1. It controls blood sugar level by converting excess glucose into glycogen.
2. Deamination of amino acids occurs in liver.
3. It synthesizes foetal RBCs.
4. It detoxifies drugs, alcohol.
5. It destroys dead RBCs and produces heparin, an anti-coagulant.
So, it is considered an important organ in our body.

(v) During unfavourable conditions, the bacterial cell draws its content into a spherical mass surrounded by a thick and hard protective wall called spore. This is called resting stage to withstand unfavourable conditions. When favourable conditions meet, the wall of spore ruptures and protoplasm becomes active. So, it is not a method of reproduction rather a method of escaping unfavourable conditions.

(b) (i) Draw the female reproductive part of a flower and label :
1. The part which is sticky and receptor of pollen grains.
2. The part that transfers male gametes.
3. The part that contains the female gametes.
(ii) How do the pollen grains reach to the female reproductive part in a flower ?
(iii) Describe how male and female gametes unite in a flowering plant.
Answer:
(i)

(ii) Pollen grains reach the stigma of carpel through pollination process by various pollinating agents like wind, insects, water etc.

(iii) The process of mixing of male and female gametes to form a zygote is called fertilization. By pollination process, pollen grains gets deposited on stigma of carpel. Under suitable conditions, they germinate. A long pollen tube containing two male gametes arises and it passes through style to reach the ovary. The ovary contains ovule which has a embryo sac. Female gamete is present inside embryo sac. The pollen tube enters the ovule through micropyle and penetrates the embryo sac. One male gamete fuses with female gamete to produce zygote whereas the second male gamete fuses with polar nuclei to form endosperm. This process is called double fertilization.

Question 7.
(a) Give biological terms for the following :
(i) The kind of plant cells with thin walls and usually a single large vacuole.
(ii) A specialized shoot in which leaves are modified into floral structures.
(iii) A condition in which filaments of stamens are united in two bundles.
(iv) The condition in which pollen from the anthers of same flower cannot germinate on the stigma of the same flower.
(v) The condition of seed in which cotyledons are thin and membranous and endosperm persists.
(vi) The spherical bacteria when occur in clusters.
(vii) The entire mass of thread-like structure of Rhizopus.
(viii) The expulsion of undigested food from alimentary canal.
(ix) The point at which two separate bones meet.
(x) The narrowing of blood vessels when outside temperature is low.
Answer:
(i) Parenchyma
(ii) Flower
(iii) Diadelphous
(iv) Self sterility
(v) Albuminous seeds
(vi) Staphylococci
(vii) Mycelium
(viii) Defaecation
(ix) Joint
(x) Vasoconstriction

(b) Study the cell organelle given below and answer the questions that follow :

(i) Identify the cell organelle. Label the parts indicated in figure.
(ii) Give two important functions of this cell organelle.
(iii) What is the function of structure labelled 4, 5?
(iv) Which is the largest cell organelle ?
Answer:
(i) Nucleus.
1-Outer membrane, 2-Inner membrane, 3-Nucleoplasm, 4-Nucleolus, 5-Chromatin reticulum, 6-Nuclear pore.

(ii) 1. Nucleus regulates and coordinates various life processes of the cell.
2. It plays an important part in cell division.

(iii) Nucleolus produces ribosomes, participates in protein synthesis by forming and storing RNA.
Chromatin become thick and ribbon-like during cell division which are the carriers of genes that control hereditary characters.

(iv) Nucleus

ICSE Class 9 Biology Question Papers with Answers

ICSE Class 9 Biology Sample Question Paper 9 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) A machine that separates suspended wastes using electric current.
(ii) The period between the entry of germs and appearance of first symptoms of a disease.
(iii) Cells that remove dust particles in the trachea.
(iv) Hereditary skin disease.
(v) Bone present in upper arm.
Answer:
(i) Electrostatic precipitator
(ii) Incubation period
(iii) Ciliated epithelial cells
(iv) Albinism
(v) Humerus

(b) Fill in the blanks :
(i) In hypogeal germination elongates faster.
(ii) In …………… pollination, there is a lot of wastage of pollen grains.
(iii) ……………solution can absorb oxygen present in air.
(iv) The only living component of xylem is ……………
(v) The matrix of bone contain salts of ……………
Answer:
(i) Epicotyl
(ii) Cross
(iii) Pyrogallol
(iv) Xylem parenchyma
(v) Calcium and phosphorus

(c) Choose the correct answer from each of the four options given below :
(i) World Health Day is celebrated on :
(a) April 7
(b) July 7
(c) December 22
(d) June 5
Answer:
(a) April 7

(ii) In which disease legs swell and resemble like that of an elephant ?
(a) Taeniasis
(b) Ascariasis
(c) Amoebiasis
(d) Filariasis
Answer:
(d) Filariasis

(iii) The sum of tidal volume, inspiratory reserve volume, expiratory reserve volume is :
(a) Total lung capacity
(b) Residual volume
(c) Vital capacity
(d) Inspiratory capacity
Answer:
(c) Vital capacity

(iv) Which of the enzymes converts proteins to amino acids ?
(a) Amylase
(b) Lipase
(c) Rennin
(d) Trypsin
Answer:
(d) Trypsin

(v) Which vitamin is synthesized by skin ?
(a) Vitamin D
(b) Vitamin B
(c) Vitamin A
(d) Vitamin C
Answer:
(c) Vitamin A

(d) Give the exact function of the following :
(i) Steapsin
(ii) Bacterial spores
(iii) Testa
(iv) Areolar tissue
(v) Pneumatophores
Answer:
(i) Steapsin is an enzyme found in pancreatic juice which converts emulsified fat into fatty acids and glycerol.
(ii) Bacterial spores can withstand unfavourable conditions like drought, heat etc. and can survive in these conditions. They can be carried by wind, water etc. and on getting favourable conditions, they germinate.
(iii) Testa protects the delicate inner parts of seed from injury and also from the attack of bacteria, fungi and insects.
(iv) Areolar tissue makes the skin elastic and helps the skin to withstand strain, holds organs in position, attaches epithelial tissue to other underlying tissues.
(v) Pneumatophores are aerial roots present mainly in mangrove plants which have pores for breathing.

(e) Choose the odd one out and categorise the rest under one group.
(i) Areolar tissue, Adipose tissue, Fibrous connective tissue, Lymph.
(ii) Parenchyma, Collenc’hyma, Sclerenchyma, Phloem.
(iii) Testa, Tegmen, Cotyledon, Aleurone layer.
(iv) Cycas, Fir, Pine, Ferns.
(v) Liver, Wind pipe, Voice box, Alveoli.
Answer:
(i) Odd : Lymph
Category : Connective tissue proper

(ii) Odd: Phloem
Category : Supporting tissue

(iii) Odd : Aleurone layer
Category : Found in bean seed

(iv) Odd : Ferns
Category: Gymnosperms

(v) Odd: Liver
Category : Parts of respiratory tract

(f) The statements given below are incorrect. Write the correct form of the statement by changing the underlined words only.
(i) Volvox is a fungi.
(ii) Lenticels are found on surface of leaves which help in gaseous exchange.
(iii) TAB vaccine contains living weakened bacteria.
(iv) Rickets is a condition in which cornea of our eyes gets dried.
(v) Amylopsin is present in intestinal juice which digests starch to maltose.
Answer:
(i) Volvox is a thallophyta.
(ii) Stomata are found on surface of leaves which help in gaseous exchange.
(iii) BCG vaccine contains living weakened bacteria.
(iv) Xerophthalmia is a condition in which cornea of our eyes gets tired.
(v) Amylopsin is present in pancreatic juice

(g) Complete the following paragraph by filling in the appropriate term :
The method of naming organisms is called …………. (i) and was introduced first by …………. (ii). The five kingdom classification was proposed by (iii). Kingdom Plantae is divided into …………. (iv), …………. (v), …………. (vi),…………. (vii), and …………. (viii). Kingdom animalia is divided into …………. (ix) and …………. (x).
Answer:
(i) Binomial nomenclature
(ii) Linnaeus
(iii) R.H. Whittaker
(iv) Thallophyta
(y) Bryophyta
(vi) Pterìdophyta
(vii) Gyrmnosperms
(viii) Angiosperms
(ix) Vertebrates
(x) Invertebrates

(h) Study the figure given below and answer the following questions :

(i) Identify the seed. Is it a monocotyledonous or dicotyledonous seed ?
(ii) Label the parts.
(iii) Give some examples of this category of seed.
(iv) What is the function of the part labelled 3, 4, 5.
(v) Discuss the two types of germination process.
Answer:
(i) It is a bean seed which is a dicotyledonous seed.
(ii) 1- Testa, 2- Tegmen, 3- Cotyledons, 4- Plumule, 5- Radicle, 6- Hypocotyl, 7- Epicotyl.
(iii) Examples of this type of seed are gram, pea etc.
(iv) Cotyledons store food for the embryo and also protects it.
Plumule is the future shoot and radicle is the future root.
The two types of germination are :
1. Hypogeal germination : Here, epicotyl elongates and cotyledons remain underground like in pea and gram.
2. Epigeal germination : Here, hypocotyl elongates and cotyledons are pushed above the ground like in castor, bean.

Section – II
(Attempt any four questions from this section)

Question 2.
(a) The apparatus given below is set up to demonstrate a particular process occurring in plants. Study the same and answer the following :

(i) Name the process. Give the overall balanced equation to represent the process.
(ii) What is the objective of the experiment ?
(iii) Why is soda lime placed in the tube ?
(iv) What change would you observe in lime water present in flask A and B ?
(v) Give one precaution to be taken in this experiment.
Answer:
(i) Respiration process is demonstrated in this experiment.
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + 38 ATP
(ii) The main objective of the experiment is to show that carbon dioxide is given out during respiration.
(iii) Soda lime absorbs carbon dioxide from the incoming air so that it does not interfere with the results of the experiment.
(iv) In flask A, lime water turns milky because on respiration by plants, carbon dioxide is produced. But in flask B, lime water does not turn milky as soda lime absorbs carbon dioxide from the incoming air.
(v) To prevent photosynthesis, the experimental set-up should be covered with a black cloth.

(b) Write two characteristic features of the following :
(i) Bacteria
(ii) Animal cell
(iii) Fungi
(iv) Aves
(v) Arthropods
Answer:
(i) Two characteristic features of bacteria are :
1. They are prokaryotes i.e., nuclear material lies free in cytoplasm without nuclear membrane and nucleolus.
2. Their cell wall is made up of peptidoglycan and sometimes a slimy protective layer is present outside the cell wall.

(ii) Two characteristic features of animal cell are :
1. Centrosome is present which initiates and regulates cell division.
2. Cell wall and plastids are absent.

(iii) Two characteristic features of fungi are :
1. They are made up of thread-like structures called hyphae.
2. They have,no chlorophyll and their body is not differentiated into roots, stem or leaves.

(iv) Two characteristic features of aves are :
1. Their forelimbs are modified into wings and they have feathers.
2. Their body is streamlined, lay eggs with calcareous shells.

(v) Two characteristic features of arthropods are :
1. Their exoskeleton is made up of chitin.
2. They have jointed limbs and their exoskeleton casts off and regrows which is known as moulting.

Question 3.
(a) Answer the following questions briefly :
(i) Give some advantages and disadvantages of cross pollination.
(ii) Give one speciality of striated muscles and cardiac muscles.
(iii) What is the name of plastid, pigment present in ripe tomato and petals of sunflower ?
(iv) Name the different structures found in epidermis and dermis of human skin respectively.
(v) What is the role of fats in our body ?
Answer:
(i) Some advantages of cross pollination are :
1. Offsprings are healthier.
2. Seeds produced are abundant and viable.
3. New varieties are produced.

Disadvantages of cross pollination :
1. Pollination is not always certain.
2. There is lot of wastage of pollen grains.
3. The process is uneconomical for the plant as flower has to be large, coloured, scented and have to produce nectar.

(ii) Striated muscles are voluntary muscles made up of long fibres which are nucleated and striated (light and dark bands run across the fibres). Cardiac muscles are involuntary and do not get tired soon. They are found only in the walls of heart.

(iii) Plastids found in ripe tomato are chromoplasts and pigment is carotene. Plastids found in petals of sunflower are chromoplasts and pigment is xanthophyll.

(iv) Epidermis is the outer thinner part of skin which consists of stratum comeum made up of protein keratin, granular layer and malpighian layer which actively divides to produce new cells. Pigment melanin which is responsible for skin colouration is found in malpighian layer. Dermis is inner thick layer which contains blood vessels, nerve fibres, hair follicles, sweat glands, sensory organs, sebaceous glands etc.

(v) Fats produce more energy than carbohydrates in our body. They are an important storage form of food. They serve as a solvent for fat soluble vitamins like A, D, E and K. Fat under skin acts as an insulating layer and keeps the body warm.

(b) Study the below figure and answer the following questions :

(i) Name the organism.
(ii) Name the disease caused by it in humans.
(iii) Give symptoms of this disease.
(iv) How is it caused and how the disease can be prevented ?
(v) Label the parts indicated in diagram.
Answer:
(i) The organism is Entamoeba histolytica.
(ii) It causes amoebic dysentery.
(iii) Symptoms are diarrhea with griping pain and discharge of mucus and sometimes blood in stools.
(iv) It is caused through contaminated food and water. This disease can be prevented by proper sanitation and protecting food from flies and dust.
(v) 1-Pseudopodium, 2-Nucleus, 3-Blood cell.

Question 4.
(a) Give reasons :
(i) Yeast is used in baking industry.
(ii) Seeds should not be planted deep in the soil.
(iii) Rest and exercise are required for healthy body.
(iv) Glottis is guarded by epiglottis.
(v) Vertebral column is curved.
Answer:
(i) Due to its property of fermentation, yeast is used in baking industry. It ferments glucose/starch of wheat flour to produce ethanol and carbon dioxide which causes rising of dough that gives the bread a light, spongy texture.

(ii) Seeds, if planted deep in the soil, cannot get sufficient amount of oxygen which is very necessary for germination process. Insufficient pushing force in the embryonic parts i.e.r hypocotyl or epicotyl to break through the upper layers of soil may lead to the failure of germination of seeds.

(iii) Rest in the form of sleep for about 6-7 hours daily is required for all our organs including brain. Physical exercise is also required which improves our blood circulation and makes us active. More amount of oxygen enters into our body by doing exercise regularly. It helps us to stay healthy and fit.

(iv) Glottis is guarded by epiglottis which is a muscular flap-like structure that prevents entry of food into our wind pipe during swallowing.

(v) Vertebral column is curved to maintain balance of body in erect position. It protects the column from breaking, absorbs pressure and shocks while walking, running etc.

(b) Answer the following questions related to human skeleton :
(i) Give some functions of skeleton in our body.
(ii) What constitute our skeleton ?
(iii) What is the classification of bones based on their shape ?
(iv) Give region-wise classification of bones and their number in humans.
(v) What is present in the cavity of long bones ? State its function also.
Answer:
Some functions of human skeleton in our body are :
1. It provides support to our body parts and gives definite shape.
2. It protects our delicate organs like brain [skull], heart and lungs [ribs], spinal cord [vertebral column] etc.
3. Blood cells are formed in marrow of long bones.
4. It is a storehouse of calcium and phosphorus.
5. Bones and muscles bring about movements in-our body.

(ii) Bones, cartilage and ligaments constitute our skeleton.

(iii) Based on their shape, bones are long, short, flat and irregular.

(iv) Axial skeleton-80 bones.
Skull : cranium-8 bones, face-14 bones
Vertebral column-33 : cervical-7, thoracic-12, lumbar-5, sacrum-1 (fused 5), coccyx-1, Ribs – 24, stemum-1.

Appendicular skeleton-126 bones
Pectoral girdle-4 (clavicle-2, scapula-2)
Humerus-2, radius ulna-4, Carpals-16, metacarpals-10, phalanges-28
Pelvic girdle-2, femur-2, tibia fibula-4, tarsals-14, meta tarsals-10, phalanges- 28, patella-2

(v) Bone marrow is present in the hollow cavity of long bones. Yellow marrow gives rise to white blood cells whereas red marrow produces red blood cells.

Question 5.
(a) Give differences between the following pairs based on guidelines given in brackets.
(i) Immovable joint and Partially movable joint (examples)
(ii) Left lung and Right lung (number of lobes present)
(iii) Liver and Pancreas (location)
(iv) Vitamin K and Vitamin D (functions)
(v) TB and Typhoid fever (causative agent)
Answer:

(b) Study the diagram given below and answer the following :

(i) What is the function of pleural fluid and trachea ?
(ii) Give the name of covering of lungs.
(iii) What are the positions of diaphragm at the time of inhalation and exhalation ?
(iv) Why should lining of alveoli be moist ?
(v) What is the significance of the structure of alveoli ?
Answer:
(i) Pleural fluid present between pleural membrane provides lubrication for free movement of expanding and contracting lungs. Trachea is the windpipe through which air moves in and out of the lungs.

(ii) Pleura is the covering of lungs which is double layered-outer parietal and inner visceral layer.

(iii) During inhalation, diaphragm contracts and flattens whereas during exhalation, diaphragm relaxes and moves towards the base of lungs and becomes dome-shaped.

(iv) For easy diffusion of respiratory gases, lining of alveoli should be moist.

(v) Alveoli provide large surface area for diffusion of gases. It is the structural and functional unit of lungs.

Question 6.
(a) The figure shows alimentary canal of man. Study the same and answer the following questions:

(i) What are the three parts of small intestine and large intestine ?
(ii) How is caecum different in man and rabbit ?
(iii) What is the fate of starch, proteins and fats ?
(iv) How are glucose and amino acids assimilated in our body ?
(v) What is the function of gall bladder ?
Answer:
(i) Three parts of small intestine are duodenum, jejunum, ileum. Parts of large intestine are caecum, colon, rectum.

(ii) Caecum is longer in rabbit than human beings. It contains bacteria which produce some enzymes that digest cellulose but in humans no cellulose digesting enzyme is present.

(iii) Starch is converted into glucose, proteins into amino acids and fats into fatty acids and glycerol.

(iv) Glucose is oxidized in the presence of oxygen to release energy in the form of ATP which is used to carry out various metabolic activities. Excess glucose is stored in the form of glycogen in liver. Amino acids are used to build proteins. Excess amino acids are broken down in liver by deamination process and are converted into urea which is excreted out. Some part is converted into glucose.

(v) Gall bladder stores bile secreted by liver.

(b) State the importance of following vitamins and minerals in our body :
(i) Iron
(ii) Sodium
(iii) Vitamin A
(iv) Riboflavin
(v) Iodine
Answer:
(i) It is an important component of haemoglobin.
(ii) It regulates acid-base equilibrium.
(iii) It is an important component of visual purple in retinal cells of eye.
(iv) It regulates oxidation of food.
(v) It is an important component of thyroxine hormone secreted by thyroid gland.

Question 7.
(a) Study the figure below and answer the following questions :

(i) Which major organ of the flower does fig. A represent ? What is the collective term for this organ ?
(ii) Label the parts indicated in the figure.
(iii) Are the contents inside part 4, male or female ? How does this content come out ?
(iv) There is a flower where we use terms like standard, wings, keel. Name the flower.
(v) What part of the flower do the names given in Q.
(iv) above refer to ?
Answer:
(i) It represents stamen, a male reproductive organ of the flower. Collectively, they are known as androecium.
(ii) 1- Filament, 2- Anther, 3- Pollen grains, 4- Pollen sacs.
(iii) Pollen grains carry male gametes so they represent male part of the flower. When pollen sacs get fully mature, they rupture to liberate pollen grains.
(iv) Sweat pea .
(v) Standard, wings, keel etc. are the petals of the flower.

(b) Write the advantages of the following in the flower to the plant concerned :
(i) Long and feathery stigma
(ii) Brightly coloured petals
(iii) Smooth and light pollen
(iv) Fragnant nectar
(v) Sticky pollen grains and stigma
Answer:
(i) Long and feathery stigma are present in anemophilous flowers which are pollinated by wind. They are long and feathery, hanging out of the flower so that they can easily trap the pollen grains carried away by the wind.

(ii) The entomophilous flowers which are pollinated by insects have brightly coloured petals that attract insects for pollination.

(iii) Pollen grains which are light, dry and smooth can be easily carried by wind and it is a special feature of wind pollinated flowers.

(iv) Flower emits sweet smelling nectar to attract insects and is a feature of anemophilous flower.

(v) In case of insect pollinated flowers, both stigma and pollen grains are sticky. Pollen grains are sticky so that they can easily stick to the body of insects and can be carried away. Stigma is sticky so that it can trap pollen grains easily from body of insects.

ICSE Class 9 Biology Question Papers with Answers

ICSE Class 9 Biology Sample Question Paper 7 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) The longest animal cell.
(ii) Tissue found in husk of coconut.
(iii) Three germ killing secretions of our body.
(iv) Cavity in the body in which human lungs are located,
(v) Location of the heat regulating centre of the body.
Answer:
(i) Neuron
(ii) Scierenchyma
(iii) Saliva, sweat, tears
(iv) Thoracic cavity
(v) Hypothalamus

(b) Choose the correct answer from each of the four options given below :
(i) First living cells were observed by :
(a) Leeuwenhoek
(b) Robert Hooke
(c) Virchow
(d) Robert Brown
Answer:
(a) Leeuwenhock

(ii) Phylum Mollusca can be distinguished from other non-chordates by the presence of :
(a) Bilateral symmetry and exoskeleton
(b) Mantle and gills
(c) Shell and non-segmented body
(d) Mantle and non-segmented body
Answer:
(c) Shell and non-segmented body

(iii) Pinna is supported by :
(a) Bone
(b) Tendon
(c) Capsule
(d) Cartilage
Answer:
(d) Cortilage

(iv) Pylorus is an opening from :
(a) Oesophagus into stomach
(b) Mouth cavity into oesophagus
(c) Stomach into intestine
(d) Intestine into rectum
Answer:
(c) Stomach into intestine

(v) The vector that transmits filarial worm is :
(a) Anopheles mosquito
(b) Culex mosquito
(c) Housefly
(d) Entamoeba
Answer:
(b) Culex mosquito

(c) Fill in the blanks :
(i) …………. is the liquid waste that runs off into the drains from the house.
(ii) ………….parasite is responsible for plague.
(iii) Incomplete closure of ………… during swallowing causes cough.
(iv) Curdling of milk occurs by …………….
(v) Three inlets of oxygen gas for respiration in plants are ………….. and ………….
Answer:
(i) Sewage
(ii) Rat-flea
(iii) Epiglottis
(iv) Lactobacillus
(v) Stomata, lenticels, general surface of roots

(d) State whether the following statements are true or false. If false, rewrite the correct form of the statement:
(i) Food is stored in endosperm in the case of maize grain.
(ii) Removing of anthers in young flowers is called pollination.
(iii) Diadelphous stamen condition is seen in Bombax.
(iv) In Volvox, a thallus-like body is present.
(v) Aspergillus is called blue mould.
Answer:
(i) True
(ii) False, Removing of antheis in young flowers is called emasculation.
(iii) False, Polyadeiphous stamen condition is seen in Bombax.
(iv) True
(v) False, Aspergillus is called green mould.

(e) Choose the odd one and include the rest under one group.
(i) Mycelium, Sporangium, Hyphae, Capsule. ,
(ii) Salivary glands, Liver, Pancreas, Prostate gland.
(iii) Glenoid cavity, Scapula, Clavicle, Acetabulum.
(iv) Frog, Salamander, Alligator, Sea cucumber.
(v) Plasmid, Cell wall, Chloroplast, Dictyosome.
Answer:
(i) Odd: Capsule
Rest belong to Rhizopus/bread mould

(ii) Odd : Prostate gland
Rest are glands associated with digestive system.

(iii) Odd : Acetabulum
Rest are associated with pectoral girdle.

(iv) Odd : Sea cucumber
Rest are vertebrates.

(v) Odd : Plasmid
Rest are found in a plant cell.

(f) Match the items given in column I with the most appropriate ones in column II and rewrite the correct matching pairs :

Answer:

(g) Differentiate between the following on the basis of guidelines given in brackets :
(i) Toxin and Antitoxin (definition)
(ii) Scrubbers and Electrostatic precipitators (function)
(iii) Sleeping sickness and Filariasis (causal agent)
(iv) Hibernation and Aestivation (definition)
(v) Immovable joint and Partially movable joint (example)
Answer:

(h) Study the formula given below and answer the following which is related to dental formula :
i 3/4 c 0/0 pm 0/1 m 1/1
(i) State the total number of teeth present in the dentition.
(ii) Is the dentition of a carnivore or herbivore ? Give reason.
(iii) Name an animal possessing such dentition.
(iv) Give dental formula of an adult human being.
(v) Give dental formula of a human child.
Answer:
(i) Total number of teeth is 20.
(ii) It is of herbivore as no canine teeth are present.
(iii) Rabbit
(iv) i 2/2 c 1/1 pm 2/2 m 3/3
(v) 2/2 c 1/1 pm 0/O m 2/2

Section – II
(Attempt any four questions from this section)

Question 2.
(a) Study the figure given below and answer the following questions:

(i) Identify figure A, B and C.
(ii) Which of them has heavy deposition of lignin ?
(iii) Which of them provides mechanical strength and flexibility ?
(iv) Which of them is modified to store chloroplasts in leaves ?
(v) Which of them is commercially exploited to obtain linen and hemp ?
Answer:
(i) A-Sclerenchyma, B-Parenchyma, C-Collenchyma
(ii) Sclerenchyma
(iii) Collenchyma
(iv) Parenchyma
(v) Sclerenchyma

(b) Give reasons :
(i) Raw mango is green in colour while ripe one is yellow.
(ii) Plasma membrane is a semi-permeable membrane.
(iii) Anthers in anemophilous flowers are loosely attached.
(iv) Disposable needles must be used for injection.
(v) Anaerobic respiration is an incomplete break down of glucose.
Answer:
(i) Raw mango contains chlorophyll which is a green pigment but when mango ripens, chlorophyll disintegrates and xanthophyll, carotene takes their places. So green colour changes to yellow or orange-red colour.
(ii) Plasma membrane allows only certain substances to pass through it while it prevents entry of other substances. So, it is called a semi-permeable membrane.

(iii) In anemophilous flowers, pollination occurs through wind. So anthers containing pollen grains are loosely attached to filament so that they can easily be blown away by slight wind movement.

(iv) Injection needles if shared by more than one person may introduce the HIV virus from one individual to another. So to prevent the transmission of HIV, disposable needles are used for injection.

(v) In anaerobic respiration, glucose is not completely oxidized. In plants or yeast cells glucose, in the absence of oxygen or insufficient oxygen, forms ethanol and carbon dioxide. In animal cells it produces lactic acid. Thus, incomplete break down of glucose occurs because when glucose completely breaks down, it gives carbon dioxide and water.

Question 3.
(a) State the exact function of the following :
(i) Municipalities
(ii) Pleural fluid
(iii) Meibomian glands
(iv) Red bone marrow
(v) HCL in gastric juice
Answer:
(i) Municipalities look after sanitation, supply of safe drinking water, arrange vaccination programmes, keep statistical records of births and deaths.

(ii) Pleural fluid is found between outer and inner membrane of lungs which provides lubrication for free movement of expanding and contracting lungs.

(iii) The secretion of meibomian glands is oily which lubricates the margins of eyelids and prevents the overflow of tears.

(iv) Red bone marrow produces RBCs.

(v) HCL makes the medium of stomach acidic so that pepsin enzyme gets activated to digest proteins. It also kills the germs that may have entered along with our food.

(b) Study the diagram given below and answer the following questions :

(i) Label the parts 1-6.
(ii) Give examples of synovial joints.
(iii) How is this joint protected ?
(iv) What is the function of the part labelled 3 ?
(v) Give an example of pivot joint.
Answer:
(i) 1-Bone, 2-Cartilage, 3-Synovial fluid, 4—Synovial membrane, 5-Fibrous capsule, 6-Ligament.
(ii) Shoulder joint, knee joint.
(iii) It is well protected by an outer fibrous capsule and held in position by ligaments. Synovial fluid lubricates the point of contact between two bones so that friction is reduced and we can easily bend our knee or shoulder without any pain.
(iv) Joint between skull and upper end of axis vertebrae.

Question 4.
(a) State the exact location of the following :
(i) Duodenum
(ii) Plasmid
(iii) Notochord
(iv) Epicalyx
(v) Columnar epithelial tissue
Answer:
(i) It is upper part of small intestine next to stomach.
(ii) Plasmids are extra-chromosomal DNA found in cytoplasm of bacteria.
(iii) It is a rod-like structure present in the mid-dorsal axis of the body in few primitive forms of chordates.
(iv) It is second series of sepals, lies outer to calyx in some flower like Hibiscus.
(v) They are tall like brick or cylindrical cells found in inner lining of stomach and intestine.

(b) Study the diagram given below and answer the following questions

(i) Identify figure A and B.
(ii) Label the parts 1-4.
(iii) What is the role of part 3 ?
(iv) Give the importance of cell organelle A and B.
(v) What is the special name of the organelle in figure B in plant cells ?
Answer:
(i) A is mitochondria, B is golgi complex
(ii) 1-Outer membrane, 2-Inner membrane, 3-Cristae, 4-Matrix.
(iii) Cristae provide a large amount of surface area for chemical reactions to occur as mitochondria is the site of aerobic respiration.
(iv) Mitochondria is the site of cellular aerobic respiration and stores energy in the form of ATP. It also synthesizes respiratory enzymes.
Golgi body synthesizes and secretes enzymes and hormones. It forms the acrosome of sperm.
(v) Dictyosomes

Question 5.
(a) Answer the following questions briefly :
(i) What is the function of ciliated epithelium and where is it found ?
(ii) Give advantages of long and feathery stigma in flowers.
(iii) Potatoes kept in basket during rainy season give out small shoots. Would you call it as germination ?
(iv) What special precaution would one take to conduct experiment on respiration process in green plants ?
(v) What are two forms of dysentery and their causal agent ?
Answer:
(i) The cells of ciliated epithelium have fine hair-like projections called cilia which constantly moves removing dust, foreign particles etc., from that region where it is present. It is found in the lining of trachea.

(ii) Long and feathery stigma is present in anemophilous flowers i.e., where pollination is done by wind. This type of stigma can easily trap pollen grains carried by wind.

(iii) No, it is called sprouting where small shoots arise from eye buds of potato tuber. But in case of germination, tiny shoots arise from seeds of plants.

(iv) We should not keep the experimental set-up containing the green plant under sunlight as carbon dioxide released will be used by plants for photosynthesis. So we should conduct respiration experiment in a dark room.

(v) Two forms of dysentery are :
1. Bacillary dysentery, caused by bacterium Shigella.
2. Amoebic dysentery, caused by protozoa Entamoeba histolytica.

(b) The figure below shows a section of a flower. Study it carefully and answer the following questions:

(i) Label the parts as indicated in figure.
(ii) Is it a perfect or imperfect flower ? Give reason.
(iii) What are esseritial and non-essential parts of a flower ?
(iv) Which are the male and female parts of a flower ?
(v) Give the collective term of the parts labelled 4,10, 3.
Answer:
(i) 1-Anther, 2-Filament, 3-Petal, 4-Sepal, 5-Receptacle, 6-Stalk, 7-Stigma, 8-Style, 9-Ovary, 10-Stamen.
(ii) It is a perfect flower as it contains all the four floral structures.
(iii) Essential parts of a flower are those that are directly concerned with reproduction e.g. stamens and carpels. Non-essential parts are those which protect the reproductive parts or helps the flower in pollination e.g. sepals and petals.
(iv) Male part is stamen which contains male gametes in pollen grains and female part is pistil which contains female gametes.
(v) Collective term for sepals is called calyx.
Collective term for stamens is called androecium.
Collective term for petals is called corolla.

Question 6.
(a) Give biological terms for the following :
(i) The process by which the cells are modified to perform specific function resulting in division of labour.
(ii) The condition in which sepals are fused in a flower.
(iii) The condition in which petals and sepals are undifferentiated together.
(iv) The type of germination seen in a bean seed.
(v) A common phase in both aerobic and anaerobic respiration.
(vi) A group of related families.
(vii) The technique of partial sterilization usually applied to milk.
(viii) A structure which prevents back flow of food from stomach into oesophagus.
(ix) The point at which two separate bones meet.
(x) The process of lifting of body hairs during emotions or winter season.
Answer:
(i) Differentiation
(ii) Gamosepalous
(iii) Perianth
(iv) Epigeat germination
(y) Glycolysis
(vi) Order
(vii) Pasteurization
(viii) Cardiac sphincter
(ix) Joint
(x) Piloerection

(b) Given below are five chemical reactions involving glucose and five different chemical products ( A-E ).

Write the reaction number for the following :
(i) Anaerobic respiration in plants
(ii) End products in aerobic respiration
(iii) Reactions occurring in liver
(iv) Anaerobic respiration in animals
(v) Storage in the liver
(vi) Aerobic respiration
(vii) Anaerobic respiration in yeast
(viii) Change taking place in potato
(ix) Fermentation
(x) During strenuous exercise in muscles
Answer:
(i) Reaction 5
(ii) Reaction 4
(iii) Reaction 3
(iv) Reaction 1
(v) Reaction 3
(vi) Reaction 4
(vii) Reaction 5
(ix) Reaction 5
(x) Reaction 1

Question 7.
(a) Give the treatment of the following diseases :
(i) Malaria
(ii) Sleeping sickness
(iii) Amoebic dysentery
(iv) Tuberculosis
(v) Typhoid
Answer:
(i) Drugs like quinine, paludrine, camoquin are used to treat malaria.
(ii) Drugs like melarsophol is used to treat sleeping sickness.
(iii) It can be treated with antibiotics. Proper sanitation, keeping food away from dust and flies.
(iv) Antibiotic streptomycin is used to treat TB and BCG vaccine helps in developing immunity against TB.
(v) Chloromycetin antibiotic is used to treat typhoid.

(b) Answer the following questions related to human skin :
(i) What are the two layers of human skin ?
(ii) Name some special derivatives of human skin.
(iii) Name the parts of a hair. Which part helps in growth and elongation of hair ?
(iv) Give the parts of a nail.
(v) Name the secretion of sweat gland. State its composition also.
Answer:
(i) The two layers of human skin are epidermis and dermis.
(ii) Some special derivatives of human skin are hair, nails, mammary glands, sweat glands, sebaceous glands.
(iii) Hair consist of three parts-hair shaft, hair root and hair bulb.
Hair bulb and hair follicle together are responsible for the growth and elongation of hair.
(iv) Plate, bed and matrix are the parts of a nail.
(v) Sweat is a secretion of sweat gland. It consists of about 99% water, 0.2-0.5% salts and traces of urea (0.08%).

ICSE Class 9 Biology Question Papers with Answers

ICSE Class 9 Biology Sample Question Paper 8 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) The organs of defense in coelenterates.
(ii) Aerial roots present in plants like mangroves which help in breathing.
(iii) Mosquito which spread yellow fever.
(iv) Fish which eats larvae of mosquito.
(v) Alternative name of lockjaw disease.
(b) Give one example for the following :
(i) Cells in our body which undergo phagocytosis
(ii) A sporadic disease
(iii) Disease caused by parasitic worms
(iv) Useful fungi
(v) Bryophyta
Answer:
(i) Stinging cells
(ii) Pneumatophores
(iii) Aedes aegypti
(iv) Gambusia
(v) Tetanus

(b) Choose the correct answer from each of the four options given below :
(i) Which one of the following is made of dead cells ?
(a) Sclerenchyma
(b) Tracheids
(c) Vessels
(d) All of these
Answer:
(i) WBCs

(ii) The symbiotic association of algae and fungi is found in :
(a) Lichens
(b) Mosses
(c) Liverworts
(d) Ferns
Answer:
(ii) Malaria

(iii) Hollow bones are found in :
(a) Snake
(b) Frogs
(c) Fishes
(d) Birds
Answer:
(iii) Taeniasis

(iv) The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid which is :
(a) Bile
(b) Mucus
(c) Saliva
(d) Lipase
Answer:
(iv) Penicillium notatum

(v) World Rabies Day is celebrated on :
(a) September 8
(b) December 1
(c) June 5
(d) March 22
Answer:
(v) Mosses

(d) Complete the following statements by choosing the correct alternatives out of those given within brackets :
(i) The flower of papaya is ………….. (perfect / imperfect/ complete)
(ii) The solid material obtained by secondary treatment of waste matter is which is used as manure,………….. (effluent /sewage / sludge)
(iii) The causative agent of chicken pox is ………….. ( varicella zoster / taenia solium/ trypanosoma)
(iv) The total lung capacity in human beings is ………….. (6000 ml/4500 ml/ 3000 ml)
(v) ………….. is one of the problem associated with sebaceous gland due to hormonal influence. ( acne/ pimples/ blackhead)
Answer:
(i) Imperfect
(ii) Sludge
(iii) Varicella Zoster
(iv) 6000 ml
(v) Acne

(e) Statements given below are incorrect. Write the correct form of the statements by changing the underlined word only :
(i) Liver is the second largest gland in our body.
(ii) Deficiency of folic acid causes scurvy.
(iii) Flame cells are excretory organs of earthworm.
(iv) Anaerobic respiration in yeast is called pasteurization.
(v) Micropyle represents the spot where ovule was attached to ovarian wall.
Answer:
(i) Pancreas is the second largest gland in our body.
(ii) Deficiency of foilic acid causes anaemia.
(iii) Flame cells are excetory organs of tapeworms.
(iv) Anaerobic respiration in yeast is called fermentation.
(v) Hilum represents the spot where ovule was attached to ovarian wall.

(f) Choose the odd one out and categorise the rest under one group.
(i) Squamous, Columnar, Glandular, Ligament.
(ii) Stigma, Style, Filament, Ovary.
(iii) Synergid, Generative nucleus, Antipodal cell, Polar nuclei.
(iv) Jellyfish, Starfish, Brittle-star, Sea cucumber.
(v) Rickets, Xerophthalmia, Pellagra, Marasmus.
Answer:
(i) Odd : Ligament
Category : Epitheial tissue.

(ii) Odd : Filament
Category: Parts of carpel/pistil.

(iii) Odd : Generative nucleus
Category: Found inside ovule.

(iv) Odd : Jellyfish
Category: Echinoderms.

(v) Odd : Marasmus
Category: Vitamin deficiency diseases.

(g) Define the following :
(i) Antibiotic
(ii) Innate immunity
(iii) Basal metabolic rate
(iv) Malnutrition
(v) Species
Answer:
(i) Antibiotic is a chemical substance produced by microbes which can kill or inhibit the growth of other microbes.

(ii) Innate immunity is the immunity by virtue of genetic constitutional makeup which is present naturally in our body without any external stimulation or a previous infection.

(iii) The rate at which the body uses energy, while at rest, to maintain vital functions such as breathing is called basal metabolic rate.

(iv) Malnutrition is the condition in which a person suffers due to lack or deficiency of one or more essential elements of food.

(v) Species means an organism of particular kind whose members can interbreed among themselves to produce fertile young ones.

(h) Complete the following analogy
(i) Aerobic respiration : 38 ATP :: Anaerobic respiration : ……………………..
(ii) Radicle : Coleorhiza :: Plumule : ……………………..
(iii) Heterostyle : Primrose :: …………………….. : Pansy flower
(iv) Bract : Bougainvillea :: …………………….. : Nectaries
(v) Red bone marrow : RBCs :: Yellow bone marrow : ……………………..
Answer:
(i) 2 ATP
(ii) Coleoptile
(iii) Herkogamy
(iv) Nasturtium
(y) WBCs

Section – II
(Attempt any four questions from this section)

Question 2.
(a) Give two parts of differences between the following pairs :
(i) Plant cell and Animal cell
(ii) Poriferans and Cnidarians
(iii) Gastric juice and Intestinal juice
(iv) Bone and Muscle
(v) Sebaceous gland and Sweat gland
Answer:

(b) Study the figure given below and answer the following questions :

(i) Identify the virus. Name the infection it causes.
(ii) Give the symptoms of the disease.
(iii) How is this disease transmitted ?
(iv) Label the parts indicated in figure.
(v) When this disease was first recognized ?
Answer:
(i) It is HIV virus. It causes AIDS.
(ii) Symptoms are swollen lymph nodes, fever, night sweats, weight loss.
(iii) The disease is transmitted by sexual contact with infected person, contaminated blood transfusion, mother to child during pregnancy, shared injection needles.
(iv) 1-Viral protein, 2-Protein covering, 3-RNA.
(v) AIDS was first recognized in USA in 1981.

Question 3.
(a) Answer the following questions briefly :
(i) Give some merits of local defense system.
(ii) Under what conditions would the breathing rate increase ?
(iii) What is roughage ?
(iv) Describe the three types of lever mechanisms in our body.
(v) State the function of Meissner’s corpuscle and Pacinian corpuscle in the skin.
Answer:
(i) Some merits of local defense system are :
1. They start working instantaneously and are not dependent on previous exposure to infections.

2. They are effective against a wide range of potentially infectious agents. Breathing rate increases during strenuous physical exercise like running, swimming, brisk walking, emergency situation like fear, nervousness. The amount of oxygen in the body tissues decreases and concentration of carbon dioxide increases, thus breathing rate increases to attain the normal level of oxygen and carbon dioxide concentration.

Roughage is the cellulose part of fruits, raw vegetables and other plant materials that we consume. It is not digested in alimentary canal as our body does not secrete cellulose digesting enzymes.

The three types of lever mechanisms found in our body are :
1. Lever of first order : Here, fulcrum lies in between power and weight.
Example : Extension of arm at the elbow by action of triceps muscles.

2. Lever of second order : Here, weight is in between fulcrum and power.
Example : Muscles of leg [gastrocnemius muscle] raising weight of the body on toes.

3. Lever of third order : Here, power is in between fulcrum and weight.
Example : Biceps muscles flexing the arm.

(v) Meissner’s corpuscles detect the sense of touch whereas pacinian corpuscle detects the sense of pressure.

(b) The figure below shows the vertebral column. Study the same and answer the following questions:

(i) Give the main function of vertebral column.
(ii) Name the bones labelled 1-5 in the figure.
(iii) Draw a labelled diagram of thoracic vertebrae.
(iv) Describe the structure of a vertebrae.
Answer:
Vertebral column protects the spinal cord, maintains balance of the body in an erect position, provides attachment of pectoral and pelvic girdles, muscles. It forms the main axis of our body and has roles in both posture and movement.

(ii) 1. Cervical , 2.Thoracic , 3. Lumbar 4. Sacrum, 5. Coccyx.

(iii)

(iv) Vertebrae is a ring-like structure and its lower part is formed of a solid cylinder of bone called centrum. On back side of centrum is neural canal formed by union of two neural arches. Spinal cord runs through neural canal. Intervertebral disc forms a kind of cushion between two vertebrae. Neural spine is a ridge which projects upwards from the point where two neural arches meet. Transverse processes are thick projections from sidewards of neural arches. Neural arches bear articular facets which helps in joining two vertebrae.

Question 4.
(a) State the exact function of the following :
(i) Stratum corneum
(ii) Matrix of nail
(iii) Canines
(iv) Osculum
(v) Stigma
Answer:

• Stratum comeum is a tough layer which protects from mechanical damage, bacterial infection and loss of water by evaporation.
• Matrix of nail produces new cells and pushes out the older cells towards tip of nail thus causing growth of nail.
• Canines are conical and sharply pointed teeth which hold and tear the food.
• Osculum is a single, large opening on the top of sycon which is a Poriferan for exit of water.
• Stigma is the tip part of carpel which receives the pollen grains during pollination and the germination of pollen grains takes place on stigma.

(b) Study the figure below and answer the following questions :

(i) What does the figure represent ?
(ii) How does nerve impulse travel from one nerve cell to other ?
(iii) What is the main function of this structure ?
(iv) Describe the pathway in which nerve impulse travels through this structure.
(v) What is the outer covering of axon known as ?
Answer:
(i) Neuron/nerve cell.
(ii) The axon terminals in their swollen tip secrete a chemical called acetylcholine which is a neurotransmitter. It induces an electrical impulse on the dendrites of adjacent neuron, thus electrical impulse travels from axonal terminals of one neuron to dendrites of next neuron through synapse.
(iii) Neuron conducts nerve impulses from central nervous system i.e., brain and spinal cord etc. to distant places in our body.
(iv) Dendrites → Cyton/cell body → Axon → Axonal terminals.
(v) Neurolemma. In some neurons, myelin sheath is present called myelinated neurons which acts as an insulating layer.

Question 5.
(a) Give two characteristic features of the following :
(i) Angiosperms
(ii) Pteridophytes
(iii) Amphibia
(iv) Cnidaria
(v) Nematoda
Answer:
(i) 1. They have highly developed plant body with roots, stem, leaves, flowers, fruits.
2. Seeds are enclosed within fruits.

(ii) 1. They are non-flowering plants with root, stem and leaves.
2. Leaves are made of leaflets bearing spores on the underside.

(iii) 1. Amphibians live partly on land and partly in water.
2. They have three chambered heart, cold-blooded, adults breathe by means of lungs while larvae by gills.

(iv) 1. They have tentacles to catch food.
2. They have hard skeleton made up of calcium carbonate.

(v) 1. They are mostly parasitic and are long, cylindrical, unsegmented with false body cavity.
2. Alimentary canal is open at both ends i.e., mouth and anus.

(b) The figure below shows a cell. Study the figure and answer the following :

(i) Identify the cell. Is it a prokaryotic or eukaryotic cell ?
(ii) Label the parts indicated in figure.
(iii) What are the locomotory organelles present in the cell ?
(iv) What is the part labelled 2 made up of ?
(v) How does this cell obtain its nourishment ?
Answer:
(i) It is a bacterial cell. It is a prokaryotic cell.
(ii) 1-Capsule, 2-Cell wall, 3-Cell membrane, 4-Cytoplasm, 5-Mesosome, 6-Pilli, 7-Bacterial chromosome, 8-Plasmid, 9-Glycogen granules, 10-Flagellum.
(iii) Flagellum is the locomotory organelle. Lashing movement of flagellum provides locomotion of bacteria in a liquid environment.
(iv) Cell wall of bacteria is made up of peptidoglycan.
(v) Bacteria shows heterotrophic mode of nutrition. It may be saprotrophic i.e., draws nourishment from decaying dead organisms or parasitic i.e., draws nourishment from body of living hosts.

Question 6.
(a) Write the disease caused due to the following deficiencies :
(i) Vitamin K
(ii) Vitamin D
(iii) Fluorine
(iv) Calcium
(v) Chlorine
Answer:
(i) Haemorrhage
(ii) Rickets in children, osteomalacia in adults
(iii) Dental decay
(iv) Rickets, poor skeletal growth
(v) Muscular cramps

(b) Study the figure below and answer the following questions :

(i) Name the ducts which arises from structure labelled 1, 2 and 3.
(ii) Name the region to which gland labelled 1 and 2 pour their secretions.
(iii) How are the enzymatic reactions different in stomach and small intestine ?
(iv) Name the region in alimentary canal where :
1. Protein digestion starts
2. Carbohydrate digestion starts
Answer:
(i) Hepatic duct arises from part 1 i.e., liver.
Pancreatic duct arises from part 2 i.e., pancreas.
Cystic duct arises from part 3 i.e., gall bladder.

(ii) Duodenum region of small intestine

(iii) In stomach due to HC1 produced by gastric glands, the medium is acidic which activates the enzyme pepsin found in gastric juice. Pepsin acts upon proteins to form peptides. But in small intestine, bile which is secreted by liver, makes the medium alkaline so that enzymes secreted by pancreas and small intestine get activated and can act upon food substrates.

(iv) 1. Protein digestion starts first in stomach.
2. Carbohydrate digestion starts first in mouth.

Question 7.
(a) Name the phylum of the following :
(i) Mussel
(ii) Grasshopper
(iii) Beetle
(iv) Nereis
(v) Bath sponge
(vi) Skates
(vii) Duck-billed platypus
(viii) Heron
(ix) Sea urchin
(x) Hookworm
Answer:
(i) Mollusca
(ii) Arthropoda
(iii) Arthropoda
(iv) Annelida
(v) Porifera
(vi) Chordata
(vii) Chordata
(viii) Chordata
(ix) Echinodermata
(x) Nematoda

(b) Study the figure below and answer the following questions:

(i) What is the aim of the experiment ?
(ii) Name the liquid taken in the test tube.
(iii) What change will you notice when air is blown into the tube and why ?
(iv) What will be the control in this experiment ?
Answer:
(i) The aim of the experiment is to show that exhaled air contains more carbon dioxide.
(ii) Liquid is lime water.
(iii) When air is blown into the tube, lime water turns milky. Lime water is calcium hydroxide [Ca(OH)₂] which when reacts with carbon dioxide gives calcium carbonate [ CaCO₃] which is a white precipitate that turns lime water milky. Ca(OH)₂ + CO₂ → CaCO₃ + H₂O
(iv) The control will be a test tube with lime water keeping undisturbed.

ICSE Class 9 Biology Question Papers with Answers