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"Pollen grains in wheat are shed at 3-celled stage while in peas they are shed at 2-celled stage." Explain. Where are germ pores present in a pollen grain ? |
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Answer» A pollen grain is partly germinated microspore representing the male gametophyte. Each mature pollen grain in angiosperms has two cells, the generative cell and vegetative cell.60% of angiosperms have 2-celled stage Pollen grains. In the remaining species, the generative cell divides mitotically and give rise to two male gametes before pollen grains are shed (3-celled stage). Small rounded unthickened areas on exine (outer layer of pollen grain) are called germ pores. |
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