When the female gametophyte (embryo sac) develops from a single megaspore, it is called monosporic development. ... The three haploid megaspores situated towards the micropyle degenerate, while one remains functional which develops into the female gametophyte.
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When the female gametophyte (embryo sac) develops from a single megaspore, it is called monosporic development. ... The three haploid megaspores situated towards the micropyle degenerate, while one remains functional which develops into the female gametophyte.