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Male Gametophyte

Germ pore is ...

Question

Germ pore is the area where exine is

A

Thick

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B

Thick and uniform

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C

Uniform

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D

Absent

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Solution

The correct option is D Absent
Germ pore is the area where pollen tube will grow and the exine is absent in that particular area. Exine is absent means that germ pore lacks sporopollenin, hence pollen tube develop from germ pore.
So the correct option is 'Absent'.

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Similar questions

Q. Consider the following statements with respect to pollen grains.
(a) Exine is thin, continuous layer made up of cellulose and pectin
(b) Hard outer layer called exine is made of sporopollenin
(c) Sporopollenin is present in germ pores
(d) Exine exhibits a fascinating array of patterns and designs. Of the statements.

Q. Assertion :Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation. Reason: Sporopollenin is absent in the region of germ pores.

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

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

Q. Match the following.

	LIST I		LIST II
A	Generative nucleus	1	Pollen tube
B	Germ pore	2	Endosperm nucleus
C	Exine	3	Testa
D	Secondary nucleus	4	Fertilization
E	Integument	5	Male nuclei
F	Egg nucleus	6	Rough

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