A) cellulose
B) sporopollenin
C) pectocellulose
D) lignin
Correct Answer: D
Solution :
A pollen grain contains two layered cell wall, the outer exine and inner intine. Sporopollenin is found in the exine of pollen grains, which is the most resistant biological material known, of niicrobial and chemical decomposition. Due to this, grains are we11 Preserved during fossilization. Intine of pollen grain is made up of pectocellulose.
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