Male Gametophyte

Q.

Sporopollenin can protect pollen grains from adverse environmental conditions and also maintain their viability over several years.

1. True

2. False

Q. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

1. Cellulose
2. Cuticle
3. Sporopollenin
4. Lignin

Q.

Technically stamens are called microsporophyll. True or false?

1. False

2. True

Q. At the time of shedding the number of nuclei present in an angiosperm pollen grain is

1. one or two
2. one
3. two or three
4. only two

Q.

Match the following

Column -I Column- II

(i) Exine (a) Sporopollenin absent

(ii) Intine (b) Tube cell

(iii) Germ pore (c) Thin continuous layer

(iv) Vegetative cell (d) Fertile cell

(v) Generative cell (e) Thick porous layer

1. (i) -(e), (ii) - (c). (iii) -(a), (iv) -(d) , (v)- (b)

2. (i) -(e), (ii) -(c), (iii)-(a), (iv) -(b) , (v) -(d)

3. (i) -(e), (ii) -(d), (iii)- (c), (iv) -(b) , (v) -(a)

4. (i) -(a), (ii) -(b) , (iii)-(c), (iv) -(d), (v) - (e)

Q.

Parthenium came to India as a seed contaminant along with

1. Rice

2. Wheat

3. Maize

4. None of the above

Q.

Regarding assertion and reason, select the right option.

Assertion (A): Pollen grains have a tough outer covering.
Reason (R): Pollen grains differs in size, shape, colour and design.

1. Both A and R are correct and R explains A

2. Both A and R are correct and R does not explain A

3. A is correct and R is incorrect

4. A and R are incorrect

Q.

Which of the following statements are correct with respect to pollen grains?

1. Each microspore develops into pollen grains.
2. Pollen grains represent male gametophytes.
3. Pollen grains are generally spherical in shape.
4. Pollen grains are viable even after fossilisation.

1. (i), (ii) & (iii)

2. (ii) & (iv)

3. (i) & (iii)

4. (ii) & (iii)

Q. Sporopollenin, a chemical substance is found in___

1. endothecium of anther
2. tapetum of anther
3. intine of pollen grain
4. exine of pollen grain

Q. Pollen tablets are available in the market for

1. In vitro fertilization
2. Breeding programmes
3. Supplementing food
4. Ex-situ conservation