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InterviewSolution
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Explain the structure of pollen grain. |
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Answer» 1. A pollen grain consists of two layers viz. outer layer is exine made up of sporopollenin which can tolerate to high temperature, strong acids and alkali. Innerlayer is intine made up of cellulose and pectin. 2. Exine has microspores at certain places called germpores. 3. A mature pollen grain has two cells. viz. a) Vegetative cells and b) Generative cells. 4. Generative cell divides mitotically to give rise two male gametes. |
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