Male Gametophyte

Q. ____________ represent the male gametophytes in angiosperms.

1. Megaspores
2. Pollen mother cells
3. Pollen grains
4. Microsporangia

Q. The inner wall of pollen grain is called ____A_____ and it is made up of ____B___.

1. exine, cellulose
2. intine, pectin
3. intine, cellulose and pectin
4. exine, sporopollenin

Q. Which among the following statements is correct?
(a) The vegetative cell of pollen grain divides to form the male gametes.
(b) Sporopollenin is absent in the germ pores.
(c) Intine of pollen grains is made up of cellulose and pectin.
(d) Pollen grains represent the male gametophyte.

1. a, b, c and d
2. a, c and d
3. a, b and d
4. b, c and d

Q. The pollen grains of __________ cause pollen allergy.

1. orchids
2. Parthenium
3. Bryophyllum
4. None of these

Q.

Which among the following substances is exine of pollen grain made up of?

1. Cellulose

2. Suberin

3. Pectin

4. Sporopollenin

Q. Sporopollenin occurs in ________.

1. cytoplasm of vegetative cell of pollen grain
2. wall of microsporangium
3. exine of pollen wall
4. intine of pollen wall

Q. The germ pores in the pollen grain are the regions ________.

1. that can withstand high temperature and strong acids and alkalis
2. through which sperms are released into the female gametophyte
3. which are made up of cellulose and pectin.
4. which lack sporopollenin

Q.

Sporopollenin is one of the most resistant organic material.

1. True

2. False

Q. Based on the given excerpt, answer the given question.

Stamen is regarded as a microsporophyll that possesses microsporangia which have microspore mother cells that give rise to microspores. The cells of sporogenous tissues undergo meiotic division to form microspore tetrad. Microspore is present in the bilobed structure called anther. A male gametophyte is a gamete producing haploid phase in a plant. In angiosperms, it is the pollen grains that are regarded as gametophytes.

The inner wall of pollen grain is called ____A_____ and it is made up of ____B___.
[1 mark]

1. A - exine, B - cellulose
2. A - intine, B - cellulose and pectin
3. A - exine, B - sporopollenin
4. A - intine, B - pectin

Q. Choose the correct statement(s) regarding pollen grains.
I. Pollen grains are the male gametes of the flowering plant.
II. Pollen grain has a prominent two-layered wall.
III. The outer thick wall of pollen grain is called exine and the inner thin wall is called intine.
IV. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic materials known.

1. I, II and III are correct
2. I, II and IV are correct
3. II, III and IV are correct
4. All are correct

Q.

Sporopollenin is one of the most resistant organic material.

1. True

2. False

Q. Which of the following is the male gametophyte in angiosperms?

1. 
2. 
3. 
4. 

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. Which among the following is true regarding pollen tablets?

1. They are used as food supplements.
2. They increase the performance of athletes and race horses.
3. They are used for pollination
4. Both a and b

Q. ____________ represent the male gametophytes in angiosperms.

1. Megaspores
2. Pollen mother cells
3. Pollen grains
4. Microsporangia

Q.

Which among the following substances is exine of pollen grain made up of?

1. Pectin

2. Sporopollenin

3. Cellulose

4. Suberin

Q.

Parthenium came to India as a seed contaminant along with

1. Rice

2. Wheat

3. Maize

4. None of the above

Q.

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

1. True

2. False

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

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

Q. Choose the correct statement(s) regarding pollen grains.
I. Pollen grains are the male gametes of the flowering plant.
II. Pollen grain has a prominent two-layered wall.
III. The outer thick wall of pollen grain is called exine and the inner thin wall is called intine.
IV. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic materials known.

1. All are correct
2. I, II and III are correct
3. I, II and IV are correct
4. II, III and IV are correct

Q.

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

1. True

2. False

Q.

Choose the incorrect statement from the options.

1. Pollen grains cause allergies and bronchial infections.

2. Pollen grains are rich in nutrients.

3. Pollen tablets and syrups are used as food supplements.

4. Consumptions of pollen grains decreases the perfomance of athletes and race horses.

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. Sporopollenin, a chemical substance is found in___

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