Biology Set 1 2017-2018 (English Medium) ICSE Class 10 Question Paper Solution

Name the following:

The organization which procures and supplies blood during an emergency

Name the following:

The blood vessel which supplies blood to the liver.

Name the following:

The number of chromosomes present in a nerve cell of a human being.

Name the following :

The layer of the eyeball that forms the transparent Cornea

Name the following :

The wax-like layer on the epidermis of leaves which reduces transpiration.

The number of Spinal nerves in a human being are :

(A) 31 pairs

(B) 10 pairs

(C) 21 pairs

(D) 30 pairs

Which one of the following is non-biodegradable?

(A) DDT

(B) Vegetable peel

(C) Cardboard

(D) Bark of trees

Aqueous humour is present between the :

(A) Lens and Retina

(B) Iris and Lens

(C) Cornea and Iris

(D) Cornea and Lens

A strong chemical substance which is used on objects and surfaces in our surroundings to kill germs:

Cresol

Carbolic acid

Iodine

Mercurochrome

Which one of the following is a Greenhouse gas?

Oxygen

Methane

Sulphur dioxide

Nitrogen

Complete the following paragraph by filling in the blank (1) to (5) with appropriate words:

To test a leaf for starch, the leaf is boiled in water to (1) _________.  It is then boiled in Methylated spirit to (2) ________. The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (3) _____ solution is added. The region of the leaf which contains starch, turns (4) ________and the region while does not contain starch, turns (5) __________.

Match the items given in Column A with the most appropriate ones in Column B and rewrite the correct matching pairs

Correct the following statements by changing the underlined words:

The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.

Correct the following statements by changing the underlined words:

The outermost layer of Meninges is Pia mater.

Correct the following statements by changing the underlined words:

The cell sap of root hair is Hypotonic.

Correct the following statements by changing the underlined words:

Xylem transports starch from the leaves to all parts of the plant body

Correct the following statement by changing the underlined word:

Nitrogen bonds are present between the complementary nitrogenous bases of DNA.

Blood in the renal artery or renal vein (Which one has more urea ?)

Perilymph or endolymph (Which one surrounds the organ of Corti ?)

Lenticels or stomata (Which one remains open always ?)

Sclerotic layer or choroid layer.(Which one forms the Iris ?)

Blood in the pulmonary artery or pulmonary vein (Which one contains less oxyhaemoglobin ?)

Given below is a representation of a type pollution.

Study the picture and answer the questions :

1) Name the type of pollution shown in the picture

2) Name one source of this pollution

3) How does this pollution affect human health?

4) Write one measure to reduce this pollution

5) State one gaseous compound that leads to the depletion of the ozone layer and creates ‘Ozone holes’.

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

Detergents, X-rays, sewage, oil spills

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

Lumen, muscular tissue, connective tissue, pericardium

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

Dendrites, Medullary sheath, Axon, Spinal cord

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong

Centrosome.Cell wall, Cell membrane, Large vacuoles

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong :

Prostate gland, Cowper’s gland, seminal vesicle, seminiferous tubules

The diagram given below represents a stage during cell division.

Study the same and answer the questions that follow:

1. Identify whether it is a plant cell or an animal cell. Give a reason in support of your answer.
2. Name the stage depicted in the diagram. What is the unique feature observed in this stage?
3. Name the type of cell division that occurs during:
   1. Replacement of old leaves by new ones
   2. Formation of gametes
4. What is the stage that comes before the stage shown in the diagram?
5. Draw a neat, labelled diagram of the stage mentioned in (iv) above keeping the chromosome number constant.

Mention the exact location of Epididymis

Mention the exact location of the Lacrimal gland

Mention the exact location of Malleus

Mention the exact location of Hydathodes

Mention the exact location of the Pulmonary semilunar valve

Given below are diagrams showing the different stages in the process of fertilisation of an egg. in the human female reproductive tract.

Study the diagrams and answer the questions:

1) Arrange the letters given below each diagram in a logical sequence to show the correct order in the process of fertilisation.

2) Where does fertilisation normally take place? and What is ‘Implantation’ that follows fertilisation?

3) Mention the chromosome number of the egg and zygote in humans.

4) Explain the term ‘Gestation’. How long does Gestation last in humans?

5) Draw a neat, labelled diagram of a mature human sperm.

A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. Observe the diagrams and answer the questions:

1. What aspect of photosynthesis is being tested in the above diagram?
2. Represent the process of photosynthesis in the form of a balanced equation.
3. Why was the plant kept in the dark before beginning the experiment?
4. What will be the result of the starch test performed on Leaf ‘A’ shown in the diagram? Give an example of a plant with variegated leaves
5. Draw a neat labelled diagram of a chloroplast.

The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:

1) Name the phenomenon that is depicted in the diagram. Define the phenomenon.

2) Give the technical term for the point of contact between the two nerve cells.

3) Name the parts numbered 1, 2 and 3.

4) How does the arrangement of neurons in the spinal cord differ from that of the brain?

5) Mention two ways by which the spinal cord is protected in our body.

Give appropriate biological or technical terms for the following:

The process of maintaining water and salt balance in the blood.

Give appropriate biological or technical terms for the following :

Hormones which regulate the secretion of other endocrine glands.

Give appropriate biological or technical terms for the following :

Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.

Give appropriate biological or technical terms for the following :

The condition in which a pair of chromosomes carries similar alleles of a particular character.

Give appropriate biological or technical terms for the following :

The complex consisting of a DNA strand and a core of histones

Give appropriate biological or technical terms for the following:

The onset of menstruation in a young girl

Give appropriate biological or technical terms for the following:

Squeezing out of white blood cells from the capillaries into the surrounding tissues.

Give appropriate biological or technical terms for the following :

The fluid which surrounds the foetus

Give appropriate biological or technical terms for the following

The relaxation phase of the heart.

Give appropriate biological or technical terms for the following :

The difference between the birth rate and the death rate

The diagram given below is that of a structure present in a human kidney.

Study the same and answer the questions that follow:

1) Name the structure represented in the diagram

2) What is the liquid entering part ‘1’ called?

Name two substances present in this liquid that are reabsorbed in the tubule.

3) What is the fluid that comes to part ‘2’ called?

Name the main nitrogenous waste in it.

4) Mention the three main steps involved in the formation of the fluid mentioned in (iii) above

5) Name the substance which may be present in the fluid in part ‘2’ if a person suffers from Diabetes mellitus.

Differentiate between the following pairs on the basis of what is indicated in the brackets.

Leaf and Liver [form in which glucose is stored]

Differentiate between the following pairs on the basis of what is indicated in the brackets.

ATP and AIDS [expand the abbreviations]

Differentiate between the following pairs on the basis of what is indicated in the brackets.

Testosterone and Oestrogen [organ which secrets]

Differentiate between the following pair on the basis of what is indicated in the bracket.

Ureter and Urethra [function]

Differentiate between the following pairs on the basis of what is indicated in the brackets.

Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]

Given below is a diagram of a human blood smear.

Study the diagram and answer the questions that follow:

a) Name the components numbered ‘1’ to ‘4’

b) Mention two structural differences between the parts ‘1’ and ‘2’.

c) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.

d) What is the average lifespan of the component numbered ‘1’ ?

e) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain

Give biological explanations for Education is very important for population control.

Give biological explanations for The placenta is an important structure for the development of a foetus

Give biological explanations for All the food chains begin with green plants.

Give biological explanations for Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.

Give biological explanations for We should not put sharp objects into our ears.

The diagram below represents a process in plants. The setup was placed in bright sunlight. Answer the following questions:

a) Name the physiological process depicted in the diagram.

Why was oil added to the water?

b) When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant? Give a suitable reason for your answer

c) What happens to the level of water when this setup is placed in:

1. Humid conditions?
2. Windy conditions?

d) Mention any three adaptations found in plants to overcome the process mentioned in (i).

e) Explain the term ‘Guttation’.

A pea plant which is homozygous for green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]. Answer the following questions;

a) Give the phenotype and genotype of the F1 generation.

Which type of pollination has occurred to produce F1 generation?

b) Write the phenotypic ratio of the F2 generation

c) Write the possible combinations of the gametes that can be obtained if two F1 hybrid plants are crossed.

d) State Mendel’s law of ‘Segregation of Gametes’

5) What is the scientific name of the plant which Mendel used for his experiments on inheritance?