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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): The pollen tube can easily emerge from the pollen grain despite the presence of extremely hard sporopollenin in the exine. Reason (R): Prominent apertures called germ pores are present on the exine where sporopollenin is completely absent. 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 1

Both (A) and (R) are true and (R) is the correct explanation of (A)

Explanation

Sporopollenin cannot be degraded by known enzymes, but germ pores are localized areas lacking sporopollenin, allowing the intine and pollen tube to emerge during germination.
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