Sexual Reproduction in Flowering Plants Question 113
113. Which is the most common type of embryo sac in angiosperms?
[2019, Odisa]
(a) Bisporic with two sequential mitotic divisions.
(b) Tetrasporic with one mitotic stage of divisions.
(c) Monosporic with three sequential mitotic divisions.
(d) Monosporic with two sequential mitotic divisions.
Show Answer
Answer : c
Hints & Solutions
(c) Monosporic embryo sac (also known as polygonum type embryo sac) is the most common type of embryo sac in flowering plants which develops after one meiosis and three sequential mitosis in megaspore mother cell. In most angiosperms, the megaspore mother cell divides by meiosis to form four haploid megaspores arranged in a linear fashion. The three haploid megaspores situated towards the micropyle degenerate, while one remains functional which develops into the female gametophyte.
