Sexual Reproduction in Flowering Plants Question 63
63. One of the most resistant biological material is
(a) lignin
(b) hemicellulose
(c) lignocellulose
(d) sporopollenin
Show Answer
Answer : d
Hints & Solutions
(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 biological and physical decomposition, due to which pollens are preserved for a long time in fossils.
