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  4. At the time of shedding, the number of nuclei present in an angiosperm’s pollen grain is

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Q. At the time of shedding, the number of nuclei present in an angiosperm’s pollen grain is

Sexual Reproduction in Flowering Plants

Solution:

In majority (60 \%) of angiosperms, the pollen grains are shed from the anther at the bicelled (2-celled) stage. But in some genera (both the monocots and dicots), the generative cell divides prior to the dehiscence of the anther and pollen grain is shed at 3-celled stage. Approximately $60 \%$ species shed their pollen at the 2 -celled stage and $40 \%$ at 3-celled stage.