In 40% of angiosperms,the pollen grains are s | vedclass

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(B) In flowering plants (angiosperms),the pollen grains are shed at either a two-celled or a three-celled stage.In over $60\%$ of angiosperms,pollen g

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Three-celled stage

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(B) In flowering plants (angiosperms),the pollen grains are shed at either a two-celled or a three-celled stage.In over $60\%$ of angiosperms,pollen grains are shed at the two-celled stage (one vegetative cell and one generative cell).In the remaining $40\%$ of angiosperms,the generative cell divides mitotically to give rise to the two male gametes before pollen grains are shed,resulting in a three-celled stage.

In $40\%$ of angiosperms,the pollen grains are shed at which stage?

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