(a) cuticle
(b) sporopollenin
(c) lignin
(d) cellulose
[CBSE AIPMT 2012, 1994]
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CONNECTING MINDS
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An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
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Correct Option (b)
Reason : Sporopollenin is a fatty substance present in the exine of pollen grains. It is resistant to microbial and chemical decomposition and can withstand the extreme environmental conditions. Due to the presence of sporopollenin, pollen grains are well preserved during fossilisation.