NEETBotanySexual Reproduction in Flowering Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Microspore tetrads formed inside the microsporangium are haploid in nature. Reason (R): They are formed by the mitotic division of diploid pollen mother cells. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- BAssertion (A) is true but Reason (R) is false.
- CAssertion (A) is false but Reason (R) is true.
- DBoth Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
Correct answer
B. Assertion (A) is true but Reason (R) is false.
Step-by-step solution
Assertion (A) is true because microspore tetrads consist of four microspores, which are haploid (n) cells. Reason (R) is false because microspore tetrads are formed by the meiotic (reductional) division of diploid pollen mother cells (PMCs), not by mitotic division. Meiosis ensures that the resulting microspores are haploid. Therefore, Assertion (A) is true but Reason (R) is false. Answer: Assertion (A) is true but Reason (R) is false.