Question

Arrange the given stages of Megasporogenesis in chronological order.
(A) Megaspore tetrad
(B) Megaspore dyad
(C) Megaspore mother cell
(D) Female gametophyte
Choose the correct answer from the options given below:

• A. (D), (A), (B), (C)
• B. (A), (D), (C), (B)
• C. (B), (A), (D), (C)
• D. (C), (B), (A), (D)

Answer 1

The Correct Option is D

The process of megasporogenesis involves the development of the female gametophyte from a megaspore mother cell through a series of stages. Here's the correct order:

(C) Megaspore mother cell: This is the diploid cell that undergoes meiosis to form haploid megaspores.

(B) Megaspore dyad: After meiosis, the megaspore mother cell divides into two haploid cells (dyad), though in most plants, only one of the cells will continue to develop.

(A) Megaspore tetrad: Following the second meiotic division, the dyad divides further into four megaspores, forming a tetrad. However, in most plants, only one of the four megaspores will survive and become functional.

(D) Female gametophyte: The surviving megaspore undergoes mitotic divisions to form the female gametophyte (or embryo sac), which is the structure that produces the egg cell.

Thus, the correct chronological order is: (C), (B), (A), (D).

Correct Answer: (4) (C), (B), (A), (D).