In over 60% of angiosperms,pollen grains are | vedclass

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(C) In angiosperms,the microspore undergoes mitosis to form two cells: a larger vegetative cell and a smaller generative cell.This stage is known as t

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Two-celled stage

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(C) In angiosperms,the microspore undergoes mitosis to form two cells: a larger vegetative cell and a smaller generative cell.This stage is known as the two-celled stage.In over $60\%$ of angiosperms,pollen grains are shed at this two-celled stage.In the remaining species,the generative cell divides mitotically to form two male gametes before the pollen grains are shed,resulting in a three-celled stage.

In over $60\%$ of angiosperms,pollen grains are shed at which of the following stages?

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