Q.

Sporopollenin is

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a

non degradable inorganic compound  

b

present in exine

c

produced by pollen grains on the stigma

d

released from sporogenous cells

answer is A.

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Detailed Solution

Sporopollenin is a complex and highly resistant biopolymer found in the walls of spores and pollen grains of plants, as well as in the cell walls of some algae and fungi.

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