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Q.

Sporopollenin : 

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a

Can be degraded by few fungal origin enzymes

b

Can withstand strong acids and alkali

c

Is the major component of intine

d

Is highly sensitive to increased temperature in the environment

answer is D.

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Detailed Solution

The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known. It can withstand high temperatures and strong acids and alkali. No enzyme that degrades sporopollenin is so far known. Pollen grains are well preserved as fossils because of the presence of sporopollenin.

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