Question

A. Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?
B. Still, it is observed that it does not form a continuous layer around the pollen grain. Give reason.
C. How are ‘pollen banks’ useful?

Answer 1

Answer:

exine is made up of sporopollenin. sporopollenin is one of the most resistant organic material .pollen grains are preserved as fossils because of presence of sporopollenin .

Answer 2

Explanation:

$\tt\pink{\underline{Exine}}$

→ It age outer layer of pollen grain and very hard.

→ It age made up of sporopollenin in which is most resistance organic material present in nature .

→Sporopollenin is Resistance to high temperatures stronger acids and alkaline and also to enzyme .