Respiration in PlantsHard

Question

Pollen grains are able to withstand extremes of temperature and dessication bacause thier exine is compossed of

Options

A.cutin
B.suberin
C.sporopollenin
D.callose

Solution

Sporopollenin, which is the hardest substance, helps the pollen grains to withstand extremes of temperathures. It avoids transpiration or water loss. this hard proteinaceous substance present in the exine make it also spinous in nature.

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