Question

Define exine???

in points???​

Answer 1

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Define exine???

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→ 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 .

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Answer 2

the outer of the two major layers forming the walls of some spores and especially pollen grains.

or

The exine, or outer layer, is composed of a highly decay-resistant chemical called sporopollenin.

or

the decay-resistant outer coating of a pollen grain or spore.

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