Question

Assertion :The megaspore mother cell divide mitotically to produce four spores. Reason: Megaspore mother cells are diploid and megaspore is haploid.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. If the assertion is false but the reason is true.

Answer 1

The correct option is D If the assertion is false but the reason is true.

The archesporial cells (2n) of young ovule cut off parietal cell and are differentiated into megaspore mother cells (2n). The diploid megaspore mother cells then undergo meiosis to form a linear tetrad of megaspores. Assertion is incorrect. As we know that meiosis is a reductional division that reduces the number of chromosomes to half in the daughter cells as compared to their parent cells. The diploid megaspore mother cells (2n) form haploid megaspores (n). Reason is correct.

Thus, the correct answer is option D.