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Question

Sporopollenin occurs in.

A
Female gametophyte
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B
Male gametophyte
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C
Vegetative cells of pollen grain
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D
Exine of pollen wall
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Solution

The correct option is D Exine of pollen wall
Sporopollenin is hardest organic substance and it made up of fatty acid and carotenids is present in outer wall of pollen grain .Pollen grain has two grain one is inner which is known as intine and other is outer which is known as exine.it protect pollen grain and increases its viability.
Correct option is D.

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