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Pollen Germination

The pollen gr...

Question

The pollen grains are well preserved as fossils because of the presence of ____________.

A

Thick exine

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B

Intine

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C

Sporopollenin

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D

Both (a) and (b)

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Solution

The correct option is C Sporopollenin
Pollen grains are well preserved as fossils because of the presence of sporopollenin. Pollen grains have a prominent two-layered wall. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known.
So, the correct answer is 'sporopollenin'

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Similar questions

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.

Q. Assertion: Pollen grains are well preserved as fossils.
Reason: The outer layer of pollen grains called the exine is made up of sporopollenin.

Q. Assertion :Pollen grains can be well preserved and used as microfossils. Reason: In certain places on pollen grains exine is absent and they have a thick layer of intine at these places.

Q. [A]: Microspores or pollen grains are safely deposited in the fossils
[R]: Pollen grains have sporopollenin in their intine

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