Sporopollenin,a chemical substance,is found i | vedclass

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(B) exine of pollen grain.Sporopollenin,found in the exine of pollen grains,is one of the most resistant organic materials known. It is highly resista

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exine of pollen grain

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(B) exine of pollen grain.Sporopollenin,found in the exine of pollen grains,is one of the most resistant organic materials known. It is highly resistant to extreme temperatures,strong acids,and alkali,and no enzyme that degrades sporopollenin is known so far. In contrast,the intine of pollen grains is composed of cellulose and pectin. The endothecium of the anther aids in dehiscence,while the tapetum provides nourishment to the developing pollen grains.

Sporopollenin,a chemical substance,is found in . . . . . .

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