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1.Sexual Reproduction in Flowering Plants
medium
Which one of the following is resistant to enzyme action?
A
Pollen exine
B
Leaf cuticle
C
Cork
D
Wood fibre
(AIPMT-2008)
Solution
(a) : Sporopollenin is a major component of the tough outer (exine) walls of spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments. It can withstand environmental extremes and cannot be degraded by enzymes and strong chemical reagents.
Standard 12
Biology
