First slide

Pre-fertilisation : Structures and Events

Question

Pollen grains are shed in 2 celled stage in

Easy

A

> 90% Angiosperm plant
B

< 50% Angiosperm plant
C

> 60% Angiosperm plant
D

< 40% Angiosperm plant

Solution

In over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage. In the remaining species, the generative cell divides mitotically to give rise to the two male gametes before pollen grains are shed (3-celled stage).

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