Question

The thin elongated slit like area present in exine of microspore are

Answer 1

These are called germpore from which Pollen tube arises from the intine of pollen grain which bear male gamete

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 .