Q31 / 180 · NEET 2019 (Odisha) · Botany

Which is the most common type of embryo sac in angiosperms?

  • A
    Tetrasporic with one mitotic stage of divisions
  • Correct answer
    B
    Monosporic with three sequential mitotic divisions
  • C
    Monosporic with two sequential mitotic divisions
  • D
    Bisporic with two sequential mitotic divisions

Solution

The most common type of female gametophyte (embryo sac) in angiosperms is the monosporic embryo sac in which the embryo sac develops from a single functional megaspore $(n)$ while the other three megasproes degenerate. The functional megaspore undergoes three sequential mitotic divisions and gives rise to 8-nucleate and 7-celled mature embryo sac.

Hence, the correct answer is option: 'B'.

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