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Male Gametophyte

Germ pores in...

Question

Germ pores in the pollen grains are regions.

A

That can withstand high temperature, strong acids and alkalies

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B

Through which sperms are released into the female gametophyte

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C

Which are made of lignin and suberin

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D

Which lack sporopollenin

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Solution

The correct option is B Which lack sporopollenin
Germ pores are regions where outer wall exine is absent. Thus sporopollenin is also absent in these regions. They give rise to pollen tube. So answer will be D option.

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

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.

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

Q. Identify the pair of wrong statements.
I. Intine of pollen grains is made up of sporopollenin.
II. Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III. Enzymes can degrade the organic material of the pollen grain exine.
IV. Sporopollenin can withstand high temperature, strong acids and alkali.

Q. Identify the pair of wrong statements in the following.
I) Intine of pollen grain is made up of sporopollenin.
II) Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III) Enzymes can degrade the organic material of the exine of pollen grain.
IV) Sporopollenin can withstand high temperatures, strong acids and alkali.

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