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Importance of Tapetum

The germ pore...

Question

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

A

that can withstand high temperature and strong acids and alkalis

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B

through which sperms are released into the female gametophyte

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C

which are made up of cellulose and pectin.

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D

which lack sporopollenin

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Solution

The correct option is D which lack sporopollenin
The outer wall of pollen grain is known as exine. It is made up of sporopollenin. It is a highly resistant substance and can withstand high temperature and strong acids and alkalis.

Germ pores are prominent apertures present on the exine. Sporopollenin is not present at the germ pores.

Sperms are released into the female gametophyte through a pollen tube.

Germ pore is not made of cellulose and pectin, it's the inner wall of pollen called intine that is made of cellulose and pectin.

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Similar questions

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. 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.

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. 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. 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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