Question

Assertion: Megaspore mother cell undergoes meiosis to produce four megaspores.
Reason: Megaspore mother cells and megaspores both are haploid.
(a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
(b) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
(c) Assertion is correct but Reason is incorrect.
(d) Both Assertion and Reason are incorrect.

Answer 1

Hint: Meiosis is the process in which a parent undergoes two successive divisions to form four daughter cells. The parent is diploid while the daughters are haploid. These cells have half the amount of genetic information. Meiosis includes interphase, prophase, metaphase, anaphase and telophase occurring two times.

Complete Answer
Megaspore mother cell, also known as megasporocyte, is diploid cell in plants in which meiosis will occur, resulting in the production of four haploid megaspores. It is found inside the ovule region of the ovary. It is a DIPLOID STRUCTURE consisting of dense cytoplasm and a large nucleus.
Megaspore mother cells divide to form female gametophytes. This division happens through meiosis. This process is called Megasporogenesis. It is the only meiotic process taking place in the cell, followed by three mitotic divisions.
During Megasporogenesis, the MMC divides into four megaspores. All of them have the same ploidy. They are all HAPLOIDS. Out of the four megaspores, three of them degenerate. The remaining one develops into the female gametophyte or embryo sac. This gametophyte takes part in the further process of reproduction.
From the above discussion, we can see that the assertion that the megaspore mother cell undergoes meiosis to form megaspores is true. But the reason that megaspore mother cells and megaspores are haploid is partially false as megaspores are haploid while MMCs are not.

Hence option (C) is correct. That is "assertion is correct but the reason is false".

Note:
Megaspore mother cells and megaspores are part of the female reproductive cycle of plants. All the sexually reproducing plants have gynoecium that is the female reproductive part. It consists of three parts: style, stigma and ovary. It receives the male gametophyte and follows the further process of reproduction.