Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
हिन्दीGiven below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In about 40% of angiosperm species, the pollen grains are shed at the 3-celled stage. Reason (R): In these species, the vegetative cell divides mitotically to form two male gametes before shedding. In the light of the above statements, choose the correct answer:
Correct answer · Option 3
is true but (R) is false
Explanation
Assertion is true because in over 60% of angiosperms pollen grains shed at 2-celled stage and in remaining (<40%) at 3-celled stage. Reason is false because it is the generative cell (not vegetative cell) that divides mitotically to produce two male gametes.