Question

The exine and intine wall layers of pollen grains are collectively termed as

Answer 1

Answer:

TECTUM

Explanation:

The exine and intine wall layers of pollen grains are collectively termed as Tectum.

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 .