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Q.
Sporopollenin is chemically
WBJEEWBJEE 2009Sexual Reproduction in Flowering Plants
Solution:
Sporopollenin is biologically most resistant organic material (fatty substance) found in the exine (outer wall) of spores and pollen grains. It consists of complex polymers with an emperical formula ( $ {{C}_{90}}{{H}_{142}}{{O}_{36}} $ ), formed by oxidative polymerization of carotenoids and their esters.