Question

Formation of embryo sac from a single megaspore nucleus is called _________ development

• A. Polysporic
• B. Bisporic
• C. Tetrasporic

Answer 1

Monosporic

Answer 2

The formation of the embryo sac from a single functional megaspore nucleus is called monosporic development. In this type of development, out of the four megaspores formed during megasporogenesis, only one remains functional, and the nucleus of this functional megaspore undergoes subsequent mitotic divisions to form the embryo sac.

The terms Bisporic development and Tetrasporic development refer to the formation of the embryo sac from two or four megaspore nuclei, respectively. The term Polysporic development is not a standard classification for embryo sac development based on the number of megaspores contributing to a single embryo sac; it sometimes refers to the presence of multiple embryo sacs within an ovule (polyspory).