First slide

Pre-fertilisation : Structures and Events

Question

Sporopollenin is

Easy

A

has cellulose and pectin
B

present in exine of pollen grain
C

has lignin
D

is present in both exine and intine of pollen grain

Solution

The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known. It can withstand high temperatures and strong acids and alkali. No enzyme that degrades sporopollenin is so far known. Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent.

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