Question

Functional megaspore in an angiosperm develops into ?

• A. Endosperm
• B. Embryo sac
• C. Embtyo
• D. Ovule

Answer 1

The Correct Option is B

In angiosperms, the process of the development of a megaspore into the embryo sac is an essential part of sexual reproduction. Let's explore this further:

Step-by-Step Explanation:

1. The megaspore is produced by the megasporocyte through the process of meiosis, which results in four haploid megaspores.
2. Typically, out of these four megaspores, only one becomes functional while the others degenerate.
3. The functional megaspore undergoes a series of mitotic divisions to develop into the female gametophyte, known as the embryo sac.
4. The embryo sac is crucial as it contains the egg cell, which fuses with the sperm cell during fertilization to form the zygote.

The correct answer is Embryo sac.

Justification for Options:

• Endosperm: This is formed after fertilization and is not directly derived from the megaspore.
• Embryo: The embryo is the result of the fertilization of the egg cell within the embryo sac, not directly from the megaspore.
• Ovule: The ovule contains the embryo sac but is not directly equivalent to it. The ovule encompasses the entire structure including protective tissues.