Question

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

• A. one
• B. one or two
• C. two or three
• D. always two

Answer 1

Answer: (C)

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.