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Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

Given 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:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
  3. is true but (R) is false
  4. is false but (R) is true

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.
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