The exine of a pollen grain is composed ...

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is

lignocellulose

sporopollenin

cellulose and lignin

pectin and cellulose

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AAKASH SERIES-SEXUAL REPRODUCTION IN FLOWERING PLANTS -EXERCISE - I (Introduction, Microsporophyll, Anther, Male gametophyte)

Flower organs have evolved from modified
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Exine of pollen grain is made up of
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