Question

in a pollen grain sporopollenin is absent in all exacept GERM PORR ,INTINE, EXINE,CYTOPLASM​

Answer 1

Answer:

In pollen grain sporopollenin is present in exine (the outer layer of pollen grain).

Sporopollenin is highly resistant.

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 .