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Microsporogenesis

Outer wall/ e...

Question

Outer wall/ exine of pollen grain is formed of.

A

Cellulose

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B

Pectocellulose

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C

Lignin

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D

Sporopollenin

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Solution

The correct option is D Sporopollenin
Sporopollenin is hardest organic substance and it made up of fatty acid or carotenids it is present in outer wall of pollen grain
Therefore current option is D.

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Similar questions

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.

Q. Exine of pollen grain is formed of.

Exine in pollen grains is formed by -

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. Exine of pollen grains is composed of

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