Question

In majority of plants pollen is liberated at.......
a)1 celled stages.
b)2 celled stages.
c)3 celled stage.
d)4 celled stage.​

Answer 1

Answer:

b) 2 celled stages.

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Answer 2

b) 2 celled stage

Explanation:

• Pollen grains are formed from pollen mother cells through microsporogenesis.
• Each diploid pollen mother cell divide by meiosis to form four haploid microspores.
• Each microspore then develops into pollen grains.
• Pollen grains have a vegetative cell and a generative cell.
• Generative cell divides to form two sperm cells.
• Thus pollen grains are liberated at two-celled stage in many angiosperms.