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Class 12th Biology 2012 Set1 Delhi Board Paper Solution

Question 18

Where is sporopollenin present in plants? State its significance with reference to its chemical nature.


Sporopollenin is present in exine of pollen grains in plants. It is one of the most resistant organic substances and can withstand high temperature, strong acids and alkali. No enzyme that degrades sporopollenin is so far known. This sporopollenin helps the pollen grain to be well preserved.