English Medium कक्षा १० - CBSE Question Bank Solutions for Science

You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.

The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :

A. Soak the seeds in plain water and keep them overnight.

B. Cut open the soaked seed and observe its different parts.

C. Take some healthy seeds in a petri-dish.

D. Drain the excess water, cover the seeds with a wet cotton cloth and leave them as it is for a day.

The correct sequence of these steps is

(a) C, A, D, B

(b) C, D, A, B

(c) A, C, D, B

(d) A, C, B, D

Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.

Identify A, B, C and D in the given diagram and write their names.

Explain the process of fertilisation in flowers.

A student is asked to study the different parts of an embryo of pea seeds. Given below are the essential steps for the experiment :
(I) Soak the pea seeds in plain water and keep them overnight.
(II) Cut open the soaked seed and observe its different parts.
(III) Take some pea seeds in a petri dish.
(IV) Drain the excess water. Cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(A) III, I, IV, II
(B) III, IV, I, II
(C) III, I, II, IV
(D) III, II, I, IV

(a) Identify A, B and C in the given diagram and write their functions.

(b) Mention the role of gamete and zygote in sexually reproducing organisms.

In the figure, the parts marked A, B and C are sequentially:

(A) Plumule, Radicle and Cotyledon

(B) Radicle, Plumule and Cotyledon

(C) Plumule, Cotyledon and Radicle

(D) Radicle, Cotyledon and Plumule

“Cell division is a type of reproduction in unicellular organism.” Justify.

Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:

Pollen grain, male gamete, female gamete, ovary.

Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:

(a) Female germ cell

(b) Male germ cell

(c) Ovary

Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.

Write the names of male and female reproductive parts of a flower.

What is phototropism?

Describe an activity to demonstrate phototropism.

List any two differences between pollination and fertilization.

Draw a diagram of the longitudinal section of a flower and label the following parts.

Answer the following question.
How does suitable pollination lead to fertilization?

A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope

Differentiate between self-pollination and cross-pollination.