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

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(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

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(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:
ICSE Class 9 Biology Sample Question Paper 8 with Answers 7

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(b) Study the figure given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 8 with Answers 1
(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

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:
ICSE Class 9 Biology Sample Question Paper 8 with Answers 2
(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)
ICSE Class 9 Biology Sample Question Paper 8 with Answers 8

(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

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 :
ICSE Class 9 Biology Sample Question Paper 8 with Answers 3
(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(b) The figure below shows a cell. Study the figure and answer the following :
ICSE Class 9 Biology Sample Question Paper 8 with Answers 4
(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 :
ICSE Class 9 Biology Sample Question Paper 8 with Answers 5
(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.

ICSE Class 9 Biology Sample Question Paper 8 with Answers

(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:
ICSE Class 9 Biology Sample Question Paper 8 with Answers 6
(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

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