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): 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:
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.