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Biology 2015-2016 ICSE Class 10 Question Paper Solution

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Biology
Marks: 80Academic Year: 2015-2016
Date & Time: 21st March 2016, 11:00 am
Duration: 2h

1. Answers to this paper must be written on the paper provided separately.
2. You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the question paper.
3. The time given at the head of the paper is the time allowed for writing the answers.
4. Attempt all questions from Section I and any four questions from Section II.


[40]1
[5]1.1 | Name the following:
[1]1.1.1

The exchange of chromatid parts between the maternal and the paternal chromatids of a pair of homologous chromosomes during meiosis.

Concept: Significance of Mitosis
Chapter:
[1]1.1.2

The number of individuals inhabiting per unit area.

Concept: Problems Posed by the Increase in Population in India
Chapter: [0.051] Population – The Increasing Numbers and Rising Problems
[1]1.1.3

The immunity acquired by providing readymade antibodies from outside for treating certain infectious diseases.

Concept: Common Health Problems in India
Chapter: [0.071] Health Organisations
[1]1.1.4

The pollutants that cannot be broken down to simple and harmless products.

Concept: Sources of Pollution and Major Pollutant - Radiation
Chapter: [0.06] Pollution
[1]1.1.5

The part of the brain that carries impulses from one hemisphere of the cerebellum to the other.

Concept: Concept of Brain
Chapter: [0.033] The Nervous System
[5]1.2 | Choose the correct answer from each of the four options given below:
[1]1.2.1

A plant cell may burst when :

Turgor pressure equalises wall pressure.

Turgor pressure exceeds wall pressure.

Wall pressure exceeds turgor pressure.

None of the above

Concept: Turgidity and Flaccidity
Chapter: [0.021] Absorption by Roots : the Processes Involved
[1]1.2.2

The individual flattened stacks of membranous structures inside the chloroplasts are known as :
A. Grana
B. Stroma
C. Thylakoids
D. Cristae

Concept: Photosynthesis
Chapter: [0.023] Photosynthesis: Provider of Food for All
[1]1.2.3

The nephrons discharge their urine at the :
A. Urinary bladder
B. Urethra
C. Renal pelvis
D. Renal pyramid

Concept: Excretion: Substances to Be Eliminated
Chapter: [0.032] The Excretory System (Elimination of Body Wastes)
[1]1.2.4

Gigantism and Acromegaly are due to :
A. Hyposecretion of Thyroxine
B. Hyposecretion of Growth hormone
C. Hypersecretion of Thyroxine
D. Hypersecretion of Growth hormone

Concept: Endocrine System -adrenal Gland
Chapter: [0.035] The Endocrine System
[1]1.2.5

The mineral ion needed for the formation of blood clot is :
A. Potassium
B. Sodium
C. Calcium
D. Iron

Concept: Composition of Blood: Blood Platelets (Thrombocytes)
Chapter: [0.031] The Circulatory System
[5]1.3 | In each set of terms given below, there is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd erm in each set and name the category to which the remaining three belong. [5] Example : ovary, Fallopian tube, Ureter, Uterus. Odd term : Ureter Category : Parts of female reproductive system.
[1]1.3.1

find odd one from following: Sewage, newspaper, Styrofoam, Hay.

Concept: Effects of Pollution on Climate, Environment, Human Health and Other Organisms
Chapter: [0.06] Pollution
[1]1.3.2

find odd one from following: Thymine, Cytosine, Adenine, Pepsin.

Concept: Human Reproductive System - Male Reproductive System
Chapter: [0.036000000000000004] The Reproductive System [0.036000000000000004] The Reproductive System
[1]1.3.3

find odd one from following: Malleus, iris, Stapes, Incus.

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[1]1.3.4

find odd one from following: Cortisone, Somatotropin, Adrenocorticotropic hormone, Vasopression.

Concept: Concept of Brain
Chapter: [0.033] The Nervous System
[1]1.3.5

find odd one from following: Typhoid, Haemophilia, Albinism, Colour blindness.

Concept: Genetics: Sex Linked Inheritance of Diseases
Chapter: [0.013000000000000001] Genetics – Some Basic Fundamentals
[5]1.4 | Complete the following paragraph by filling in the blanks (i) to (v) with appropriate words:

_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.

Concept: Excretion: Substances to Be Eliminated
Chapter: [0.032] The Excretory System (Elimination of Body Wastes)
[5]1.5 | State the exact location of the following structures:
[1]1.5.1

State the exact location of the Centromere

Concept: Structure of Chromosomes
Chapter: [0.012] Cell Cycle, Cell Division and Structure of Chromosomes
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[1]1.5.2

State the exact location of the Chordae tendinae

Concept: Human Circulatory System
Chapter: [0.031] The Circulatory System
[1]1.5.3

State the exact location of the Thyroid gland

Concept: Endocrine System -adrenal Gland
Chapter: [0.035] The Endocrine System
[1]1.5.4

State the exact location of the Ciliary body

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[1]1.5.5

State the exact location of the Proximal convoluted tubule.

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[5]1.6

Given below is a diagram depicting a defect of the human eye, study the same and then answer the questions that follow:

(i) Name the defect shown in the diagram.
(ii) What are the two possible that cause this defect?
(iii) Name the type of lens used to correct this defect.
(iv) With the help of a diagram show how the defect shown above is rectified using a suitable lens.

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[5]1.7

Given in the box below are a set of 14 biological terms. Of these, 12 can be paired into 6 matching pairs. Out of the six pairs, one has been done for you as an example. 
Example : endosmosis - Turgid cell.
Identify the remaining five matching pairs :

Cushing’s syndrome, Turgid cell, Iris, Free of rod and cone cells, Colour of eyes, Hypoglycemia, Active transport, Acrosome, Addison’s disease, Blind spot, Hyperglycemia, Spermatozoa, Endosmosis, Clotting of blood.

 

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[5]1.8 | State the main function of the following :
[1]1.8.1

State the main function of the Lymphocytes of blood

Concept: Composition of Blood: Blood Platelets (Thrombocytes)
Chapter: [0.031] The Circulatory System
[1]1.8.2

State the main function of the Leydig cells

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[1]1.8.3

State the main function of the Guard cells

Concept: Active, Passive, and Bulk Cell Transport
Chapter: [0.021] Absorption by Roots : the Processes Involved
[1]1.8.4

State the main function of the Eustachian tube

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[1]1.8.5

Name the functions : Corpus luteum

Concept: Menstrual Cycle
Chapter: [0.036000000000000004] The Reproductive System
[10]2
[5]2.1

The figure given below is a diagrammatic representation of a part of the cross section of the root in the root hair zone. Study the same and then answer the questions that follow

(i) Name the parts indicated by the guidelines 1 to 4.
(ii) Which is the process that enables the passage of water from the soil into the root hair?
(iii) Name the pressure that is responsible for the movement of water in the direction indicated by the arrows. Define it.
(iv) Due to an excess of this pressure sometimes drops of water are found along the leaf margins of some plants especially in the early mornings. What is the phenomenon called?
(v) Draw a well labelled diagram of the root hair cell as it would appear if an excess of fertiliser is added to the soil close to it.

Concept: Water Absorption by the Root
Chapter: [0.021] Absorption by Roots : the Processes Involved
[5]2.2 | Differentiate between the following pairs on the basis of what is mentioned within brackets
[1]2.2.1

Differentiate between Human skin cell and Human ovum (number of chromosomes).

Concept: Human Reproductive System - Male Reproductive System
Chapter: [0.036000000000000004] The Reproductive System [0.036000000000000004] The Reproductive System
[1]2.2.2

Differentiate between Sperm duct and fallopian rube (function)

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[1]2.2.3

Differentiate between Red Cross and WHO (one activity)

Concept: International Bodies: Who (World Health Organisation)
Chapter: [0.071] Health Organisations
[1]2.2.4

Differentiate between Rod cells and cone cells (pigment)

Concept: Human Reproductive System - Male Reproductive System
Chapter: [0.036000000000000004] The Reproductive System [0.036000000000000004] The Reproductive System
[1]2.2.5

Differentiate between LUBB and DUP (names of the valves whose closure produce the sound)

Concept: Human Circulatory System
Chapter: [0.031] The Circulatory System
[10]3
[5]3.1

Given below is the outline of the human body showing the important glands :

(i) Name the glands marked 1 to 4.
(ii) Name the hormone secreted by part 2. Give one important function of this hormone.
(iii) Name the endocrine part of the numbered 3.
(iv) Why is the part labelled I called the master gland? Which part of the forebrain controls the gland labelled I?
(v) Name the gland that secretes the ‘emergency hormone’.

Concept: Endocrine System -adrenal Gland
Chapter: [0.035] The Endocrine System
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[5]3.2

The diagram of an given below demonstrates a particular process in plants. Study the same and answer the questions that follow :

(i) Name the apparatus.
(ii) Which phenomenon is demonstrated by this apparatus?
(iii) Explain the phenomenon mentioned in (ii) above.
(iv) State two limitations of using this apparatus.
(v) What is the importance of the air bubble in the experiment?
(vi) Name the structures in a plant through which the above process takes place.

Concept: Water Absorption by the Root
Chapter: [0.021] Absorption by Roots : the Processes Involved
[10]4
[5]4.1

(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions :
1. The sensory cells that helps in hearing.
2. The part that is responsible for static balance of the body.
3. The membrane covered opening that connects the middle ear to the inner ear.
4. The fluid present in the middle chamber of cochlea.
5. The structure that maintains dynamic equilibrium of the body.

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[5]4.2 | Give the Biological/technical term for the following:

the Biological/technical term for Complete stoppage of menstrual cycle in females

Concept: Menstrual Cycle
Chapter: [0.036000000000000004] The Reproductive System

the Biological/technical term Pigment providing colour to urine. 

Concept: Excretion: Substances to Be Eliminated
Chapter: [0.032] The Excretory System (Elimination of Body Wastes)

the Biological/technical term for The vein which drains the blood from the intestine to the liver.

Concept: Human Circulatory System
Chapter: [0.031] The Circulatory System

the Biological/technical term for The canal through which the testes descend into the scrotum just before the birth of a male baby

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System

The Biological/technical term for The process causing an undesirable change in the environment

Concept: Pollution - Types of Pollution
Chapter: [0.06] Pollution

The Biological/technical term for The removal of nitrogenous wastes from the body

Concept: Excretion: Substances to Be Eliminated
Chapter: [0.032] The Excretory System (Elimination of Body Wastes)

the Biological/technical term for The repeating components of each DNA strand lengthwise

Concept: Genetics: Sex Linked Inheritance of Diseases
Chapter: [0.013000000000000001] Genetics – Some Basic Fundamentals

the Biological/technical term for An alteration in the genetic material that can be inherited. 

Concept: Genetics: Sex Linked Inheritance of Diseases
Chapter: [0.013000000000000001] Genetics – Some Basic Fundamentals

The Biological/technical term for The process of uptake of mineral ions against the concentration gradient using energy from the cell

Concept: Active, Passive, and Bulk Cell Transport
Chapter: [0.021] Absorption by Roots : the Processes Involved

the Biological/technical term for Blood vessels carrying blood to the left atrium.

Concept: Human Circulatory System
Chapter: [0.031] The Circulatory System
[10]5
[5]5.1

The given diagram shows a stage during mitotic division in an animal cell

(i) Identify the stage. Give a reason to support your answer.
(ii) Draw a neat labelled diagram of the cell as it would appear in the next stage. Name the stage.
(iii) In what two ways is mitotic division in an animal cell different from the mitotic division in a plant cell?
(iv) Name the type of cell division that occurs during :
A. Growth of a shoot
B. Formation of pollen grains.

 

Concept: Mitosis and Its Types
Chapter: [0.012] Cell Cycle, Cell Division and Structure of Chromosomes
[5]5.2 | Give scientific reasons for the following statements :
[1]5.2.1

Give scientific reasons : Colour blindness is more common in men than in women.

Concept: Genetics: Sex Linked Inheritance of Diseases
Chapter: [0.013000000000000001] Genetics – Some Basic Fundamentals
[1]5.2.2

Give scientific reasons: Injury to medulla oblongata leads to death.

Concept: Common Health Problems in India
Chapter: [0.071] Health Organisations
[1]5.2.3

Give scientific reasons: When an ovum gets fertilized, menstrual cycle stops temporarily in a woman.

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[1]5.2.4

Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria 

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[1]5.2.5

Give scientific reasons: Blood flows in arteries in spurts and is under pressure.

Concept: Composition of Blood: Blood Platelets (Thrombocytes)
Chapter: [0.031] The Circulatory System
[10]6
[5]6.1

The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow: 

(i) Label the parts numbered 1 to 3 in the diagram.
(ii) Mention any two functions of the part labelled 2 in the diagram.
(iii) Explain the significance of the part numbered 3 in the diagram.
(iv) Define the term ‘Gestation’. What is the normal gestational period of the developing human embryo?
(v) Mention the sex chromosomes in a male and female embryo.

Concept: Human Reproductive System
Chapter: [0.036000000000000004] The Reproductive System
[5]6.2

The following diagram demonstrates a physiological process taking place in green plants. The whole set up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow

(i) What aspect of the physiological process is being examined?
(ii) Explain the physiological process mentioned in (i) above.
(iii) Label the parts numbered 1 and 2 in the diagram.
(iv) Write a well-balanced chemical equation for the physiological process explained in (ii) above.
(v) What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.

 

Concept: Photosynthesis
Chapter: [0.023] Photosynthesis: Provider of Food for All
[10]7
[5]7.1

A homozygous tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf (t) plant bearing white (r) flowers :-
(i) Give the genotype and phenotype of the plants of F1 generation.
(ii) Mention the possible combinations of the gametes that can be obtained from the F1 hybrid plant.
(iii) State the Mendel’s law of Independent Assortment.
(iv) Mention the phenotypes of the off springs obtained in F2 generation.
(v) What is the phenotypic ratio obtained in F2 generation?

Concept: Genetics: Mendel’s Laws of Inheritance
Chapter: [0.013000000000000001] Genetics – Some Basic Fundamentals
[5]7.2
[1]7.2.1

Briefly explain the following terms : Reflex action

Concept: Reflex Action and Reflex Arc
Chapter: [0.033] The Nervous System
[1]7.2.2

Briefly explain the following terms: Power of accommodation

Concept: Ear: Parts and Functions of the Ear
Chapter: [0.033] The Nervous System
[1]7.2.3

Briefly explain the following terms: Photophosphorylation

Concept: Photosynthesis
Chapter: [0.023] Photosynthesis: Provider of Food for All
[1]7.2.4

Briefly explain the following terms: Hormone

Concept: Endocrine System -adrenal Gland
Chapter: [0.035] The Endocrine System
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[1]7.2.5

Briefly explain the following terms: Synapse

Concept: Nervous System - Structure of Neuron
Chapter: [0.033] The Nervous System
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