Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

Answer the question from the diagram of typical anatropous ovule.

The embryo sac is also known as:

Options:

megaspore

female gametophyte

megasporophyll

megagamete

Correct Answer:

female gametophyte

Explanation:

The correct answer is Option (2) → female gametophyte

Arising from the placenta are the megasporangia, commonly called ovules. The number of ovules in an ovary may be one (wheat, paddy, mango) to many (papaya, water melon, orchids).The ovule is a small structure attached to the placenta by means of a stalk called funicle. Enclosed within the integuments is a mass of cells called the nucellus. Cells of the nucellus have abundant reserve food materials. Located in the nucellus is the embryo sac or female gametophyte. An ovule generally has a single embryo sac formed from a megaspore.

The embryo sac, also known as the female gametophyte, is a crucial structure within the ovule of a flowering plant. It is formed through the process of megasporogenesis, which involves the differentiation and development of a single megaspore mother cell within the ovule. The megaspore mother cell undergoes meiosis to produce four haploid megaspores. Out of these four megaspores, three degenerate and only one megaspore survives and develops into the embryo sac.