Male Gametophyte

Q.

Sporopollenin is one of the most resistant organic material.

1. True

2. False

Q.

What are somatic cells?

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.

Technically stamens are called microsporophyll. True or false?

1. True

2. False

Q. You have studied Mitosis in onion root tip cells. Can you tell how many chromosomes will the cell have at G1 phase, after S phase, and after M phase? Also what will be the DNA content of the cells at G1, after S and at G2 , if the content after M phase is 2C?

Q. Pollen grain divides into a larger cell and a smaller cell.

1. generative
2. spore
3. gametic
4. vegetative

Q. Pollen grains can withstand extreme environmental conditions due to the presence of in their exine.

1. cellulose
2. pectin
3. sporopollenin
4. keratin

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. What is the function of pollen grain?
[1 Mark]

Q.

The germ pores in the pollen grain are the regions

1. which are made up of lignin and suberin

2. which lack sporopollenin

3. that can withstand high temperature and strong acids and alkalies

4. through which sperms are released into the female gametophyte