Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

Assertion: Cleistogamous flowers require pollinating agents.
Reasoning:: Chasmogamous flowers do not expose their sex organs.

Options:

Both Assertion (A) and Reason (R) are correct and R is the correct explanation of A.

Both Assertion (A) and Reason (R) are correct  but R is not the correct explanation of A.

Assertion (A) is true but Reason (R) is false .

Both Assertion (A) and Reason are false (F ).

Correct Answer:

Both Assertion (A) and Reason are false (F ).

Explanation:

The correct answer is Option (4) →Both Assertion (A) and Reason (R) are false.

Explanation:

Assertion: "Cleistogamous flowers require pollinating agents."False

  • Cleistogamous flowers remain closed and undergo self-pollination without the need for external pollinators.
  • Since anthers and stigma are enclosed within the same flower, pollen transfer occurs automatically, ensuring assured seed-set even in the absence of pollinators.

Reason: "Chasmogamous flowers do not expose their sex organs."False

  • Chasmogamous flowers are open flowers, where the stigma and anthers are exposed to facilitate cross-pollination by wind, insects, or other agents.
  • Since their reproductive organs are exposed, they do not rely solely on self-pollination like cleistogamous flowers.