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Given below are two statements : one is labelled as Assertion (A) and the other is Reason (R):
Assertion (A): Pollen grains are well preserved as fossils.
Reason(R) : Resistant material namely sporopollenin is present in the exine of pollen grains.

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(A) is correct but (R) is not correct

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) and (R) both are incorrect

answer is D.

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Detailed Solution

The pollen grains have a two-layered wall, the outer exine and inner intine. The exine is made up of sporopollenin and has germ pores.

Since sporopollenin is resistant to heat and acids ,it protects the pollen from mechanical and chemical damage, leading to better fossilization.

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