A) lignin
B) hemicellulose
C) lignocellulose
D) sporopollenin
Correct Answer: D
Solution :
[d] Each pollen has two layered wall. The outer layer is thick, tough, cuticularised called exine which is composed of a material called "sporopollenin". It is highly resistant to oiulogica; and physical decomposition, due to which pollens are preserved for a long time in fossils.
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