Name the organic material exine of the pollen grain is made up of . How is the material advantageous to pollen grain
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(a) The hard outer layer called exine is made up of sporopollenin which is one of the most resistant organic material. It can withstand high temperature, strong acids and alkalis. ... Pollen grain exine has prominent aperture called germ pore where sporopollenin is absent.
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The wall of pollen grain is called sporoderm which is having two wall layers outer exine and inner intine . The exine is made up of sporopollenin which is produced by oxidative polymerisation of carotens. Sporopollenin is one of the most chemically inert biological polymers. Give protection to the generative and vegetative cell present in pollen grain
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