Question

Why the exine should be hard and what is the function of germ pore?

Answer 1

Answer:

Initiation of pollen tube

Explanation:

The germ pores are pertures in the exine layer of the pollen gain where the sporopollenin is absent. The germ pore helps in the formation of the germ tube or pollen tube and which makes its exit on gemination

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 .