Biology
Sporopollenin is

Sporopollenin is Option 1 : Most resistant organic matter knownOption 2 : Present in exine of pollen grainOption 3 : Absent in the germ pole of pollen grainOption 4 : All of these

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Exine of pollen is

Exine of pollen is(A) Hard outer layer of pollen grain(B) Most resistant organic matter known.(C) Layer made up of sporopollenin.(D) Layer which can withstand high temperature, strong acids and alkali.(E) Layer which cannot be degraded by any known enzyme. Option 1 : A and BOption 2 : A, B, C ...

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