ICSE Class 9 Biology Sample Question Paper 3 with Answers

ICSE Class 9 Biology Sample Question Paper 3 with Answers

Section -1
(Attempt all questions from this section)

Question 1.
(a) Name the following :
(i) A common phase in both aerobic and anaerobic respiration.
(ii) Method of the naming of organisms.
(iii) Inactivated toxins but can still cause the body to make antibodies.
(iv) Type of germination where cotyledons remain underground.
(v) The condition of suffering in our body due to deficiency of some essential elements of food.
Answer:
(i) Glycolysis
(ii) Binomial nomenclature
(iii) Toxoids
(iv) Hypogeal germination
(v) Malnutrition

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(b) Choose the correct answer from each of the four options given below :
(i) Red Cross Day is celebrated on :
(a) September 17
(b) November5
(c) May 8
(d) June 5
Answer:
(c) May 8

(ii) The most rapidly increasing and much harmful waste today is :
(a) Municipal sewage
(b) Plastics
(c) Pesticides
(d) Electronic waste
Answer:
(b) Plastics

(iii) The germ causing hepatitis is transmitted through :
(a) The bite of a mosquito
(b) Contamination of food by housefly
(c) Personal contact with a patient
(d) Contaminated water
Answer:
(d) Contaminated water

(iv) During inspiration, diaphragm :
(a) Relaxes
(b) Gets folded
(c) Contracts
(d) Expands
Answer:
(c) Contracts

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(v) The visible part of hair is :
(a) Shaft
(b) Root
(c) Papilla
(d) Bulb
Answer:
(a) Shaft

(c) Fill in the blanks :
(i) The liquid found inside vacuoles is called ……………….
(ii) ………………. is responsible for increase in diameter of the stem.
(iii) Elephophily is found in ………………. flower.
(iv) Birds lay eggs with shells.
(v) ………………. is a free-living nitrogen fixing bacteria in the soil.
Answer:
(i) Cell sap
(ii) Cambium
(iii) Rafflesia
(iv) Calcareous
(v) Azotobacter

(d) The statements given below are incorrect. Correct the following statements by changing the last word only :
(i) The cells in stratum comeum are made up of protein melanin.
(ii) Result of anaerobic respiration in muscles cells is pyruvic acid.
(iii) The first cervical vertebrae is called axis.
(iv) Trypsinogen is converted into activated trypsin by HCl.
(v) Absence or shortage of vitamins in diet over a continued period causes hereditary diseases.
Answer:
(i) The cells in stratum comeum are made up of protein keratin.
(ii) Result of anaerobic respiration in muscles cells is lactic acid.
(iii) The first cervical vertebrae is called atlas.
(iv) Trypsinogen is converted into activated trypsin by enterokinase.
(v) Absence or shortage of vitamins in diet over a continued period causes deficiency diseases.

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

Column IColumn II
(i) Scorpion
(ii) Earthworm
(iii) Bacteria
(iv) Xerophthalmia
(v) Osteomalacia
(a) Calciferol
(b) Capsule
(c) Clitellum
(d) Arthropoda
(e) Retinol

Answer:

Column IColumn II
(i) Scorpion
(ii) Earthworm
(iii) Bacteria
(iv) Xerophthalmia
(v)  Osteomalacia
(d) Arthropoda
(c) Clitellum
(b) Capsule
(e) Retinol
(a) Calciferol

(f) Choose the odd term and categorize the rest under one group.
(i) Beriberi, Pellagra, Rickets, Marasmus, Pernicious anaemia.
(ii) Penicillum, Rhizopus, Mucor, Aspergillus, Streptococcus pneumonie.
(iii) Dogfish, Starfish, Jellyfish, Crayfish, Cuttlefish.
(iv) Sieve tubes, Fibres, Companion cells, Vessels.
(v) Cholera, Typhoid, Chicken pox, Tuberculosis, Diabetes.
Answer:
(i) Odd : Marasmus
Category : Vitamin deficiency diseases

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(ii) Odd : Streptococcus pneumonie
Category: Fungi

(iii) Odd : Dogfish
Category : Invertebrates

(iv) Odd: Vessels
Category : Components of phloem

(v) Odd : Diabetes
Category : Infectious or communicable diseases

(g) Given below are five s ets of terms. Rewrite the terms in correct order in a logical sequence beginning with the term that is underlined.
(i) Trachea, Alveoli, Bronchioles, Larynx, Nostrils.
(ii) Sacrum, Coccyx, Lumbar, Thoracic, Cervical vertebrae.
(iii) Phalanges. Humerus, Carpal, Radius-ulna, Metacarpal, Pectoral girdle.
(iv) Bolus, Salivary amylase, Mouth. Oesophagus, Peristalsis, Stomach.
(v) Fertilization, Germination of pollen grain, Pollination. Growth of pollen tube towards ovary, Formation of fruits and seeds.
Answer:
(i) Nostrils, Larynx, Trachea, Bronchioles, Alveoli.
(ii) Cervical vertebrae, Thoracic, Lumbar, Sacrum, Coccyx.
(iii) Phalanges, Metacarpal, Carpal, Radius-ulna, Humerus, Pectoral girdle.
(iv) Mouth, Salivary amylase, Bolus, Oesophagus, Peristalsis, Stomach.
(v) Pollination, Germination of pollen grain, Growth of pollen tube towards ovary, Fertilization, Formation of fruits and seeds.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(h) Give the exact function of the following :
(i) Xylem
(ii) Fibrous connective tissue
(iii) Bile
(iv) Foramen magnum
(v) Erector muscle
Answer:
(i) Xylem is a conducting tissue which conducts water upwards from roots to leaves and other parts of the plant.

(ii) Fibrous connective tissue form tendons and ligaments which connect bones to muscles and bone to bone respectively.

(iii) Bile neutralizes the acid content of food received from stomach and makes it alkaline so that enzymes from pancreatic juice and intestinal juice can act on various components of food and convert them into simpler form. It emulsifies fats i.e., it converts large fat globules into small droplets.

(iv) Foramen magnum is a hole in the back of cranium from which spinal cord emerging from brain continues behind the backbone.

(v) Erector muscles contracts and pulls the hair to vertical position and form goosebumps to produce heat, mainly during winter season when body is cold.

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

Question 2.
(a) Study the diagram given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 1
(i) What does the figure represent ?
(ii) Label the parts 1-6.
(iii) What is the function of this cell ?
(iv) What is the function of the part labelled 1 and 6 ?
(v) Where is this cell likely to be found in the human body ?
Answer:
(i) The figure represents structure of a neuron/nerve cell.
(ii) 1-Dendrites, 2-Nucleus, 3-Cyton, 4-Nodes of Ranvier, 5-Axon terminals, 6-Axon.
(iii) Neuron conducts nerve impulses to different parts of the body. It is concerned with perception of stimuli and provides responses to the received stimuli. It transmit information to other nerve cells, muscles or glands.
(iv) Dendrites receive the impulses and transmit it into cyton.
Axons are the long cytoplasmic processes of neuron which carry impulses away from cyton.
(v) It is associated with nervous system of our body i.e., brain, spinal cord, cranial nerves, spinal nerves etc.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(b) Study the diagram and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 2
(i) Identify the type of tissue and give a reason to support your answer.
(ii) Identify parts 1-4 labelled in the figure above.
(iii) What are the functions of part labelled 1-4 ?
(iv) Where is this-tissue located ?
Answer:
(i) It is phloem tissue as the cells show cellular contents.
(ii) 1-Sieve plate, 2-Sieve cell, 3-Phloem parenchyma, 4-Companion cell.
(iii) Sieve plates are perforated which allow water and dissolved organic solutes to flow along the sieve tubes.
Sieve cell transports food from leaves to storage organs and other parts of the plant. Phloem parenchyma stores starch, fats and other organic food material. Companion cell helps in functioning of sieve tube cells.
(iv) It is found in leaves and stem of plants to transport manufactured food from leaves to other parts of the plant.

Question 3.
(a) The figure represents a part of a flower. Study it carefully and answer the following questions:
ICSE Class 9 Biology Sample Question Paper 3 with Answers 3
(i) Identify the part of flower. What is the collective term for this organ known as ?
(ii) What is the main function of this part in a flower ?
(iii) Label the parts indicated in the figure.
(iv) Give the function of parts labelled 1 and 2.
Answer:
(i) It is the male reproductive organ of a flower called stamen. A group of stamens is collectively known as androecium.
(ii) It produces male gametes that play an important role in reproduction process.
(iii) 1-Pollen grains, 2-Anther, 3-Filament, 4-Stamen.
(iv) Pollen grains carry the male gamete which is transferred from anther to stigma of flower for fertilization process.
Anther produces the pollen grains which carry the male gametes.

(b) Answer the following questions briefly.
(i) Name three kinds of muscles found in human body and the places in the body where they are found.
(ii) What are nectaries and what is its function ?
(iii) What do you mean by hydrophilous flowers ? Give few characteristics of these flowers with an example.
(iv) Differentiate between respiration and breathing.
(v) Why do we shiver and our teeth chatter when it is very cold in winter ?
Answer:
(i) Three kinds of muscles found in our body are :
1. Striated/skeletal/striped/voluntary muscles : They move according to our will and are found in arms, legs, face, neck etc.

2. Unstriated/ smooth/ unstriped/ involuntary muscles : They do not move under our control or will. They are found in walls of intestine, iris muscles of eye, urinary bladder, uterus, lining of blood vessels etc.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

3. Cardiac muscles : They are found in the walls of heart only and are involuntary in function.
(ii) Nectaries are group of nectar (which is a sweet fragrant liquid) secreting cells and they are situated usually at the base of petals or pistils. The nectar secreted by these cells attract insects like honeybees for cross pollination.
(iii) Hydrophilous flowers are those flowers whose pollination is done by water.
Some characteristics of these flowers are :
1. Flowers are colourless and small.
2. Pollen grains are light, long ribbon-like structures.
3. Flowers do not contain nector.
Example : Vallisneria

RespirationBreathing
Respiration is a biochemical process.Breathing is a physical process.
Respiration includes intake of oxygen, utilization by cells to release energy.Breathing is simply taking in of oxygen dioxide and giving out carbon

When outside temperature is low during winter, our body temperature starts to fall, so as to maintain our body heat. Hypothalamus initiates some mechanisms to generate body heat. There is sudden contraction of our body muscles which generate heat by shivering and our body temperature increases, feeling us warm. Teeth chattering is a form of shivering which keeps us warm.

Question 4.
(a) Study the figure given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 4
(i) What does the figure represent ?
(ii) Label the parts 1-10.
(iii) Which is known as windpipe and how is it protected ?
(iv) Why is it advised to breathe through nose and not through mouth ?
(v) Name the functional unit of lungs.
Answer:
(i) The figure represents respiratory system of human beings.
(ii) 1-Nasal cavity, 2-Nostrils, 3-Larynx, 4-Pharynx, 5-Trachea, 6-Left bronchus, 7-Right bronchus, 8-Right lung, 9-Left lung, 10-Diaphragm.
(iii) Trachea is known as windpipe and it is protected by C-shaped cartilaginous rings which provide flexibility and keep it in distended condition.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(iv) Nostrils have fine hairs which trap large particles like dust and other foreign particles present in air and prevent them from entering into the respiratory tract. Nasal chamber warms and moistens the air and its mucous secretion traps the harmful particles letting dust and germ free air into our body. Thus, we should breathe through nose and not through mouth.
(v) Alveoli

(b) Differentiate the following :
(i) Actively acquired immunity and Passively acquired immunity.
(ii) Vaccination and Immunization.
(iii) Degradable and Non-degradable wastes.
(iv) Hinge joint and Ball and socket joint.
(v) Digestion in mouth and Digestion in stomach.
Answer:
(i)

Actively acquired immunityPassively acquired immunity
It is the resistance developed by the individual due to. previous infection which might enter the body naturally or introduced artificially by vaccination.Immunity acquired by an individual from an outside source in the form of readymade antibodies.

(ii)

VaccinationImmunization
Vaccination is the process of artificially introducing of dead or weakened germs or germ substances into our body to develop resistance for a particular disease.Immunization is the process of developing resistance to disease- producing germs or their toxins by introducing killed germs to induce production of specific antibodies.

(iii)

Degradable wasteNon-degradable waster
Degradable waste gets converted into simpler, non-toxic form by the action of microbes or other chemical means.
Examples : Animals waste, agricultural residues, peels of vegetables, fruits etc.
Non-degradable substances cannot be degraded by the action of microbes or other chemical process.
Examples : Plastics, metals, glass, electronic wastes etc.

(iv)

Hinge jointBall and Socket joint
Hinge joint moves like a hinge of door in one plane only. It is found in elbow joint, knee joint.Ball and socket joint is found in shoulder joint and hip joint which allows movement in all direction.

(v)

Digestion in mouthDigestion in stomach
In mouth, mainly starch is digested by the action of ptyalin enzyme of saliva and is converted into maltose.In stomach, proteins are mainly digested by the action of pepsin enzyme and are converted into polypeptides.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

Question 5.
(a) Study the figure given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 5
(i) What process does figure A and figure B represent ?
(ii) Label the parts 1-4 as indicated in the figures.
(iii) Define the process represented in figure A and B respectively.
(iv) Give some names of the agents that help in these processes.
(v) Give two advantages and disadvantages of the process represented in figure A.
Answer:
(i) Figure A represents self pollination and figure B represents cross pollination.
(ii) 1-Stigma, 2-Anther, 3-Petal, 4-Sepal.
(iii) Self pollination is the transfer of pollen grains from anther to stigma of same flower or stigma of another flower but in same plant. Cross pollination is the transfer of pollen grains from anther to stigma of flowers in different plants but of same species.
(iv) Some agents which help in pollination are water, wind, insects, birds, animals etc.
(v) Advantages of self pollination are :
1. Parental characters are preserved.
2. No need to produce large number of pollen grains for pollination.

Disadvantages :
1. It does not yield new varieties.
2. The defective or weaker character cannot be eliminated.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(b) Give biological terms for the following :
(i) The process by which seed germinates inside the fruit attached to the parent plant.
(ii) The opening through which pollen tube enters the embryo sac for fertilization.
(iii) The condition in which anther and stigma occupy different heights.
(iv) Chemicals found in the blood which acts against antigens.
(v) The wave of contraction and relaxation in gut to push the food.
(vi) The process of heating at very high temperature to kill microbes.
(vii) Animals whose body temperature remains constant.
(viii) The method of grouping living organisms based on their similarities and differences.
(ix) The first phase of breaking down of glucose in cytoplasm.
(x) The protective sheath of radicle.
Answer:
(i) Viviparous germination
(ii) Micropyle
(iii) Heterostyly
(iv) Antibodies
(v) Peristalsis
(vi) Sterilization
(vii) Homeothermic animals
(viii) Classification
(ix) Glycolysis
(x) Coleorhiza

Question 6.
(a) Answer the following questions related to our skin :
(i) Write a brief note on epidermis layer of skin.
(ii) State some functions of skin.
(iii) List four ways in which the skin serves as a protective layer for our body.
(iv) What is melanin ? State its function also.
Answer:
(i) Epidermis is the outermost thin layer of the skin which has three layers :
1. Stratum comeum which is the outermost layer made up of dead cells. These cells are made up of structural protein keratin. These cells get replaced continuously. This layer is tough and provide resistance against bacterial infection, mechanical damage and loss of water by evaporation.

2. Granular layer is thin middle layer which gives way to outermost comified layer.

3. Malpighian layer is the innermost layer which actively divides to produce new cells to replace worn out cells of corneum layer. Pigment melanin is present in this layer which protects us from harmful UV rays of sun.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(ii) Some functions of skin are :
1. It prevents the entry of disease-causing germs, harmful UV rays of sun.
2. It provides sensation for touch, pain, pressure, heat etc.
3. It regulates our body temperature.
4. It excretes out excess water, salts in the form of sweat.
5. It helps in synthesis of vitamin D when exposed to sunlight.
6. It stores reserve food in the form of fat layer.

(iii) The four ways in which skin serves as a protective layer are :
1. It protects us from harmful UV rays of sun.
2. It prevents excessive loss of water by evaporation thus conserves our body fluids.
3. It protects the underlying tissues from injury and mechanical shocks.
4. It prevents entry of harmful substances and disease-causing germs into our body.

(iv) Melanin is a pigment present in the cells of malpighian layers which provides colouration to our skin. It also protects our body from harmful effects of the UV rays of sun.

(b) Study the diagram given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 6
(i) Name the parts labelled 1-7.
(ii) Identify the type of tooth and give a reason to support your answer.
(iii) Which is the hardest substance in our body ?
(iv) Describe the part labelled 3.
(v) What are the different types of teeth present in human beings ? Also state their function.
Answer:
1-Enamel, 2-Dentine, 3-Pulp, 4-Cement, 5-Crown, 6-Neck, 7-Root.
(ii) It is either an incisor or canine teeth as it has only one root.
(iii) Enamel
(iv) Pulp is the soft connective tissue found in the pulp cavity of the tooth which consists of blood capillaries, lymph vessels and nerve fibres.
(v) There are four different types of teeth :
1. Incisors for cutting and biting.
2. Canines for holding and tearing the food.
3. Premolars for grinding and crushing the food.
4. Molars for grinding and crushing the food.
5. It helps in synthesis of vitamin D when exposed to sunlight.
6. It stores reserve food in the form of fat layer.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

Question 7.
(a) Study the diagram given below and answer the questions that follow :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 7
(i) Label the parts.
(ii) Give some functions of human skeleton.
(iii) What constitute our rib cage ?
(iv) Name the bones of leg.
(v) What are girdles ? Mention its types.
Answer:
(a) (i) 1-Cranium, 2-Mandible, 3-Clavicle, 4-Stemum, 5-Rib cage, 6-Humerus, 7-Ulna, 8-Radius, 9-Carpals, 10-Metacarpals, 11-Phalanges, 12-Vertebral column.
(ii) Some functions of human skeleton are :
1. It provides support and shape to our body.
2. It protects our delicate organs.
3. They bring about movement.
4. They are storehouse of calcium and phosphorus.
5. Some bone marrow of long bones helps in formation of blood cells.
(iii) 12 pairs of ribs along with thoracic vertebrae and sternum forms our rib cage.
(iv) Tibia, fibula, tarsals, metatarsals, phalanges, femur and patella.
(v) Girdles are the part of skeleton which help to articulate the limb bones to the axial skeleton. They are of two types-shoulder pectoral girdle and hip pelvic girdle.

ICSE Class 9 Biology Sample Question Paper 3 with Answers

(b) Study the diagram given below and answer the following questions :
ICSE Class 9 Biology Sample Question Paper 3 with Answers 8
(i) What processes are depicted in figure A and B ?
(ii) An error is there in the figure above. Can you point out the error ?
(iii) What does the following represent in our body :
1. Bell jar
2. Balloons
3. Rubber sheet
4. Tube
(iv) Give the significance of this process in our body.
Answer:
Breathing process i.e., inspiration and expiration.
(ii) In figure B since balloons are inflated, so rubber sheet should be pulled inwards towards the bell jar.
(iii) 1. Thoracic cavity
2. Lungs
3. Diaphragm
4. Trachea and bronchi
(iv) Breathing is a very important process by which we take in oxygen gas and give out carbon dioxide. By inhalation process, we take in oxygen for breaking down of glucose to release energy which is required to carry out our metabolic activities. The harmful carbon dioxide gas released by oxidation of glucose is removed from our body by exhalation process.

ICSE Class 9 Biology Question Papers with Answers

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