A reproductive cell or multicellular structure that is resistant to environmental conditions?
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The answer is Sporopollenin.
Pollen grains has a prominent two layered-wall.
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 temperature and strong acids and alkali. No enzyme that degrades Sporopollenin is so far known.
Inner layer called intine. It is a thin, continuous layer made up of cellulose and pectin.
Pollen grains has a prominent two layered-wall.
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 temperature and strong acids and alkali. No enzyme that degrades Sporopollenin is so far known.
Inner layer called intine. It is a thin, continuous layer made up of cellulose and pectin.
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