ICSE Class 9 Biology Sample Question Paper 2 with Answers

ICSE Class 9 Biology Sample Question Paper 2 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) The lubricating fluid around a movable skeletal joint.
(ii) The method of disposal of waste by burning.
(iii) The drug based on arsenic compound produced in 1910 which killed germs of syphilis.
(iv) Maximum air which can, at any time, be held in the two lungs.
(v) Modified sebaceous glands found in auditory canal which secrete ear wax.
Answer:
(i) Synovial fluid
(ii) Incineration
(iii) Salvarsan
(iv) Total lung capadty
(v) Ceruminous glands

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(b) Choose the correct answer from each of the four options given below :
(i) A particular species of which one of the following, is the source bacterium of the antibiotic discovered next to penicillin for the treatment of tuberculosis
(a) Escherichia
(b) Streptomyces
(c) Rhizobium
(d) Nitrobacter
Answer:
(b) Streptomyces

(ii) Fat soluble vitamins are :
(a) A, D and E
(b) B, C and D
(c) B, D and E
(d) A, B and C
Answer:
(a) A, D and E

(iii) The enzymes found in intestinal juice are :
(a) Trypsin, amylase, lactase
(b) Steapsin, lipase, erepsin
(c) Maltase, lipase, erepsin
(d) Sucrase, trypsin, steapsin
Answer:
(c) Maltase, lipase, erepsin

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(iv) Which one of the following categories of vertebrae are correctly numbered ?
(a) Sacral – 4
(b) Thoracic – 10
(c) Lumbar – 4
(d) Cervical – 7
Answer:
(d) Cervical – 7

(v) Anaerobic respiration normally occurs in :
(a) Grass
(b) Coconut
(c) Cactus
(d) Baker’s yeast
Answer:
(d) Baker’s yeast

(c) Fill in the blanks :
(i) The fluid mosaic model of plasma membrane was given by …………….
(ii) The covering of muscle fibre is …………….
(iii) The whorl of floral leaves outside the sepal is called …………….
(iv) The pollen tube enters the ovule through the …………….
(v) The outermost cover of the seed is …………….
Answer:
(i) Singer and Nicolson
(ii) Sarcolemma
(iii) Epicalyx
(iv) Micropyle
(v) Testa

ICSE Class 9 Biology Sample Question Paper 2 with Answers

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

Column IColumn II
(i) Flower stalk(a) Involuntary
(ii) Tendon(b) Pedicel
(iii) Cardiac muscle(c) Connect muscle to bone
(iv) Trachea(d) Site of gaseous exchange
(v) Alveoli(e) Windpipe

Answer:

Column IColumn II
(i)  Flower stalk
(ii) Tendon
(iii) Cardiac muscle
(iv) Trachea
(v)  Alveoli
(b) Pedicel
(c) Connect muscle to bone
(a) Involuntary
(e) Windpipe
(d) Site of gaseous exchange

(e) Identify the odd term in each set and name the category to which the remaining 3 belong :
(i) Lysol, Benzoic acid, DDT, Mercurochrome.
(ii) Cholera, Typhoid, Tuberculosis, Malaria.
(iii) Pleura, Trachea, Bronchi, Pericardium.
(iv) Caecum, Duodenum, Ileum, Jejunum.
(v) Sucrose, Maltose, Lactose, Fructose.
Answer:
(i) Odd: DDT
Category: Antiseptics

(ii) Odd : Malaria
Category: Bacterial diseases

(iii) Odd : Pericardium
Category : Parts of respiratory system

(iv) Odd : Caecum
Category : Parts of small intestine

(v) Odd : Fructose
Category : Disaccharides

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(f) Mention the exact location of the following :
(i) Epiglottis
(ii) Subcutaneous fat layer
(iii) Scapula
(iv). Caecum
(v) Stigma
Answer:
(f) (i) Epiglottis is flap-like structure located at the entrance of windpipe.
(ii) Subcutaneous fat layer are layers of fat cells found beneath the dermis.
(iii) Scapula is a flat triangular shaped bone which lies dorsally on upper ribs on either side of vertebral column in the thorax region.
(iv) Caecum is situated at the junction of small intestine and large intestine.
(v) Stigma is located at the top of pistil.

(g) Differentiate between the following pairs on the basis of guidelines given in brackets :
(i) Chicken pox and AIDS (causative agent)
(ii) Red Cross and WHO (main role)
(iii) Hypoxia and Asphyxiation (definition)
(iv) Hinge joint and Ball and Socket joint (location)
(v) Pepsin and Ptyalin (function)
Answer:

(i)

Chicken poxAIDS
Causative agent is Varicella Zoster Virus (VZV).Causative agent is Human Immuno- denficiency Virus (HIV).

(ii)

Red Cross WHO
The main role of Red Cross is to extend relief and help to the victims of calamity like flood, earthquake, fire, famine etc.The main role of WHO is to collect and supply information about occurrence of diseases of epidemic nature.

(iii)

Hypoxia Asphyxiation
Hypoxia is a condition in which body or region of body is deprived of adequate oxygen supply at the tissue level.Asphyxiation is the condition in which blood becomes more venous due to accumulation of carbon dioxide and the oxygen supply is diminished.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(iv)

Hinge jointBall and Socket joint
Hinge joint is found in elbow between humerus and ulna, bones of finger and toes, knee joint.Ball and socket joint is found in shoulder joint where head of humerus fits into socket of shoulder girdle.

(v)

Pepsin Ptyalin
Pepsin acts on protein and converts it into peptides.Ptyalin acts on carbohydrate and coverts it into maltose and glucose.

(h) Study the diagram given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 1
Identify the cell A and B. Give reason in support of your answer.
(ii) List the structures present in both cells A and B.
(iii) Name the structures found only in plant cells and those found only in animal cells.
(iv) Name the powerhouse of the cell.
(v) What is the site of protein synthesis ?
Answer:
(i) Cell A is plant cell because it contains cell wall, chloroplasts, large vacuoles. Cell B is animal cell as cell wall and chloroplasts are absent and centrosome is present.
(ii) The structures present in both cells are mitochondria, nucleus, cell membrane,
endoplasmic reticulum, golgi complex, ribosomes etc.
(iii) Cell wall, chloroplasts are present only in plant cells whereas centrosome is found only in animal cells.
(iv) ‘Mitochondria
(v) Ribosomes

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

Question 2.
(a) Study the diagram given below and answer the following :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 2

(i) Label the parts 1-8 as indicated in diagram above.
(ii) Name the digestive glands labelled in the diagram. Also name their secretions.
(iii) Give the names of enzymes secreted by part 4 and write their functions.
(iv) In which part of the given figure, mostly water is absorbed ?
Answer:
(i) 1-Oesophagus, 2-Stomach, 3-Liver, 4-Pancreas, 5-Large intestine, 6-Small intestine, 7-Anus, 8-Vermiform appendix.
(ii) Digestive glands are pancreas and liver and their secretions are pancreatic juice and bile respectively.
(iii) Enzymes secreted by pancreas are :
1. Pancreatic amylase : It acts on starch and converts to maltose.
2. Trypsin : It acts on proteins and polypeptides to produce smaller peptides and amino acids.
3. Steapsin : It acts on emulsified fats and converts to fatty acids and glycerol.
(iv) Water is mostly absorbed in large intestine.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(b) Answer the following briefly :
(i) Give the postulates of cell theory.
(ii) Give some characteristics of meristematic tissues.
(iii) Define inflorescence and placentation.
(iv) Mention some conditions which favour cross pollination.
(v) Why do we not use the terms maize fruit or maize seed ? What do we say instead ?
Answer:
(i) The postulates of cell theory are :
1. The cell is the basic and smallest unit of structure of all living beings.
2. All organisms are made up of one or more cells.
3. All cells arise from pre-existing cells.

(ii) Some characteristics of meristematic tissues are :
1. They are actively dividing cells present in growing regions of roots and shoots.
2. They are small, cubical with thin cell wall and large nucleus.
3. These cells are tightly packed with almost no intercellular spaces.
4. Vacuoles are absent but other cell organelles are present in large numbers.

(iii) Inflorescence is the mode of arrangement of flowers on the axis of the plant. Placentation is the manner in which ovules are arranged or attached to the wall of the ovary.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(iv) Some conditions which favours cross pollination are :
1. Unisexuality i.e., if the flowers are either male or female and born on separate plants. Example : Papaya which has separate male and female trees.
2. Self sterility where stigma cannot receive pollen grains from anthers of same flowers.
3. Herkogamy where pollen grains cannot reach stigma of same flower due to some mechanical or structural barriers.
4. Dichogamy where anther and stigma of same flower mature at different times.

(v) We do not use the term maize fruit or maize seed, instead we called it as maize grain as it is a one seeded fruit where fruit wall and seed coat are fused together to form a protective layer.

Question 3.
(a) Study the diagram given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 3
(i) What does the figure represent?
(ii) Label the parts 1-10.
(iii) What is the function of part labelled 3 ?
(iv) What is the fate of part 3 and 7 after fertilization ?
(v) What do you mean by double fertilization ?
Answer:
(a)  The figure represents germination of pollen grain and fertilization process.
(i) 1 – Pollen grain, 2 – Stigma, 3 – Pollen tube, 4 – Style, 5 – Ovule, 6-Embryo sac, 7 – Ovary, 8 – Polar nuclei, 9 – Micropyle, 10 – Nucellus.
(iii) Function of pollen tube is to transport male gamete cell from stigma to the ovule for
the process of fertilization.
(iv) After fertilization, ovules develop into seeds and ovary forms the fruit.
(v) The process in which one male nucleus fuses with egg cell nucleus to form zygote while other male nucleus fuses with two poiar nuclei to form endosperm is called double fertilization.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(b) Give biological term for the following :
(i) Biological catalysts which alter the rate of a biochemical reaction.
(ii) The organisms which possess both the sex organs in one individual.
(iii) The immediate treatment and care given to a person who has suddenly fallen sick or met with an accident till the time medical team arrives.
(iv) The period between the entry of germs and appearance of first symptoms ofthe disease.
(v) The immunity acquired by an individual from an outside source.
(vi) The air breathed in and out in a normal quiet breathing.
(vii) Complete loss of pigmentation of skin all over the body.
(viii) The process of breaking down of large fat globules into tiny droplets.
(ix) The process in which microbes break down carbohydrates into simpler products in the absence of oxygen.
(x) The incomplete breakdown of organic matter by bacteria emitting foul smell.

Answer:
(i) Enzymes
(ii) Hermaphrodite
(iii) First-aid
(iv) Incubation period
(v) Passively acquired immunity
(vi) Tidal volume
(vii) Aibmism
(viii) Emulsification
(ix) Fermentation
(x) Putrefaction

ICSE Class 9 Biology Sample Question Paper 2 with Answers

Question 4.
(a) Study the diagram below and answer the questions that follow :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 4
(i) What are the conditions necessary for germination of seed ?
(ii) Name a solution which absorbs oxygen.
(iii) Why in the figure above middle seed germinates but not top and bottom seed ?
(iv) Define germination.
(v) Draw a structure of a matured embryo of a bean seed labelling all its major parts
Answer:
(a) (i) Suitable temperature, water and oxygen are essential conditions required for germination of seeds.
(ii) Alkaline pyrogallic acid.
(iii) The seed placed in middle gets both water and oxygen which are required for germination process, so it germinates. But top seed gets only air/ oxygen but no water, similarly, bottom seed gets water only but very limited oxygen. So, they can not germinate.
(iv) The process of formation of seedling from the embryo is called germination.
(v)
ICSE Class 9 Biology Sample Question Paper 2 with Answers 9

(b) Give reasons :
(i) Cells are generally small in size.
(ii) Xylem and phloem are called conducting tissues.
(iii) Germinated grams are considered highly nutritive.
(iv) Respiration is said to be reverse of photosynthesis.
Answer:
(i) Small size of cells provide large surface area to volume ratio for greater diffusion of substances in and out of the cell. Also, they can communicate with each other raplidy to function effectively.

(ii) Xylem conducts water and mineral salts from roots upwards to the leaves and other parts of the plant. Similarly, phloem conducts manufactured food from leaves to the other parts of plants both upwards and downwards. Hence, they are called conducting tissues.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(iii) Seeds contain endosperm, which stores food for the developing plants. When seed germinates, this complex food material is converted into diffusible form so that it can be used for growth. Hence, germinated gram seeds are considerd to be highly nutritive.

(iv) Respiration is a catabolic process where glucose breaks down to release carbon dioxide and energy, whereas photosynthesis is an anabolic process where glucose is synthesized using carbon dioxide and water. In respiration, oxygen is utilized and carbon dioxide is released but in photosynthesis, oxygen is released and carbon dioxide is utilized. So, respiration is said to be reverse of photosynthesis.

(v) A fluid called synovial fluid which is found within joints provides lubrication and reduces friction, but with age, this fluid gets dried up and due to loss of calcium in bones, they lose their strength and become weak. So, old people complain of stiff joints.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

Question 5.
(a) Study the diagram and answer the following :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 5
(i) What does the figure represent ?
(ii) Label the parts 1-8.
(iii) Which is called voice box and why ?
(iv) How is the part labelled 7 protected ?
(v) Name the parts in sequence through which atmospheric air reaches the air sacs
Answer:
(a)
(i) The figure represents respiratory system of human being.
(ii) 1-Nasal passage, 2-Larynx, 3-Bronchioles, 4-Alveoli, 5-Diaphragm, 6-Bronchi, 7-Lungs, 8-Trachea.
(iii) Larynx is called voice box as it contains vocal cords which vibrates when air is
expelled out forcibly through it, thus, producing sound.
(iv) Lungs are protected by rib cage and membranous covering called pleura; the outer parietal and inner visceral layer with pleural fluid in between. The fluid provides lubrication during contraction and expansion of lungs.
(v) Nostrils → nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles → alveolar ducts→ alveoli.

(b) Give causes and symptoms of the following diseases :
(i) Marasmus
(ii) AIDS
(iii) Malaria
(iv) Cholera
(v) Tuberculosis
Answer:
(i) Marasmus is caused usually in infants below 1 year age due to deficiency of carbohydrates, fats and proteins in diet. Symptoms are less body weight, skin become loosely fold, thin face and limbs, retarded physical and mental growth, ribs appear prominent from outside.

(ii) AIDS is caused due to sexual intercourse with infected individual, contaminated blood transfusion, shared injection needles, infected mother to child during pregnancy. Symptoms are fever, night sweats, weight loss and swollen lymph nodes,

(iii) Malaria is caused by a protozoan Plasmodium which is transmitted through saliva of female Anopheles mosquitoes. Symptoms are chills, high fever, nausea, vomiting, headache etc.

(iv) Cholera is caused by a special bacterium called Vibrio cholera which is spread through contaminated food and water. Symptoms are vomiting, severe loose motions, little or no urination, muscle cramps, abdominal pain, dehydration etc.

(v) Tuberculosis is caused by rod-shaped bacteria Mycobacterium tuberculosis and spread from sputum of infected persons. Symptoms are persistent cough, fever during afternoon, chest pain, breathlessness, bloody mucus, loss of weight, fatigue etc.

ICSE Class 9 Biology Sample Question Paper 2 with Answers

Question 6.
(a) Give two examples each of the organisms belonging to the following category :
(i) Protista
(ii) Fungi
(iii) Cnidaria
(iv) Porifera
(v) Mollusca
Answer:
(i) Euglena, amoeba
(ii) Yeast, penicillium
(iii) Jelly fish, hydra
(iv) Bathsponge, sycon
(v) Snail, octopus.

(b) The figure below represents the microscopic structure of human skin. Study the same and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 6
(i) Label the parts 1-8.
(ii) How does the skin help in maintaining body temperature ?
(iii) How does the skin protect our body from germs and UV rays ?
(iv) Name any two modifications of sebaceous glands.
(v) State the functions of parts 1 and 5.
Answer:
(a) (i) 1-Hair shaft, 2-Sweat pore, 3-Sebaceous gland, 4-Sweat gland, 5-Fat, 6-Dermis,7-Epidermis, 8-Blood vessels.

(ii) When outside temperature is high, skin loses extra heat by dilation of blood vessels which results in sweating. As sweat evaporates, it provides cooling sensation. But when outside temperature is low, the blood vessels get constricted, so blood supply is reduced preventing loss of heat leading to less or no sweating, thus conserving heat to keep us warm.

(iii) A pigment called melanin is present in malpighian layer of the skin which protects the inner parts of body from harmful effects of UV rays of sun. Sebaceous glands secrete sebum which prevents the entry of germs into our body.

(iv) Meibomian glands and ceruminous glands

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(v) Function of part 1 : Hair provides sensation of touch, prevents entry of foreign particles. Function of part 5 : Fat layer serves as food reserve and shock absorber.

Question 7.
(a) The following set-up was arranged to prove a particular physiological process in plants. Study the same and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 7
(i) Name the physiological process being studied.
(ii) What is the function of soda lime in the bottle A and why is lime water placed in bottle B ?
(iii) What change would you expect to observe in bottle D ?
(iv) If bottle C was fitted with a three holed rubber stopper and a thermometer was introduced in such a way that its bulb reaches close to the germinating seeds, what would you observe ?
(v) Represent the physiological process named in (i) above in the form of a chemical equation.
Answer:
(i) Carbon dioxide is given off from germinating seeds during the respiration process.
(ii) Soda lime absorbs carbon dioxide from the air which enters the tube. Lime water is placed in bottle B to check whether the incoming air is free from carbon dioxide or not as it turns milky in the presence of carbon dioxide gas.
(iii) Lime water turns milky as carbon dioxide is given out by germinating seeds by respiration process.
(iv) As heat is also evolved during respiration, so if a thermometer is inserted in bottle C, there would be rise in mercury level.
C6H12O6 + 6  O2 —» 6CO2 + 6H2O + Energy

ICSE Class 9 Biology Sample Question Paper 2 with Answers

(b) Study the diagram below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 2 with Answers 8
(i) What does the diagram represent ?
(ii) How leguminous plants help in nitrogen fixation ?
(iii) Name the bacteria that converts :
1. Ammonium compounds to nitrites
2. Nitrites to nitrates
(iv) How are nitrates in the soil converted to nitrogen ?
(v) How plants and animals play an important role in the formation of ammonium compounds ?
Answer:
(i) Nitrogen cycle
(ii) Leguminous plants contain Rhizobium in their root nodules which pick up free nitrogen from atmosphere and convert it into soluble nitrates which can be used by plants. This process is called nitrogen fixation.
(iii) 1. Nitrosomonas
2. Nitrobacter
(iv) Denitrifying bacteria are present in soil which converts nitrates present in soil into nitrogen.
(v) Nitrogenous wastes are present in dead remains of plants and animals which are converted into ammonia by bacteria. Ammonia is then converted into ammonium compounds. In this way, plants and animals play an important role in the formation of ammonium compounds.

ICSE Class 9 Biology Question Papers with Answers

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