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Which one of the following statements is wrong?
The megasporocyte develops within the megasporangium of the ovule.
Megasporocyte undergoes meiosis to produce four haploid megaspore.
All the four megaspores undergo several mitotic divisions to form female gametophyte in most angiosperms
Female gametophyte is haploid.
Answers (1)
In most angiosperms, only one of the four megaspores undergoes mitotic divisions to form the female gametophyte, also known as the embryo sac. The other three megaspores degenerate or do not undergo further development.
The process of megasporogenesis starts with the formation of a megasporocyte within the ovule. The megasporocyte undergoes meiosis, resulting in the formation of four haploid megaspores. Typically, three of these megaspores degenerate, leaving only one functional megaspore.
The surviving megaspore then undergoes several rounds of mitotic divisions, producing a multicellular structure called the female gametophyte or embryo sac. The female gametophyte consists of several cells, including an egg cell, two synergids, three antipodal cells, and the central cell with two polar nuclei. These cells play important roles in the process of fertilization and subsequent embryo development.
So, in most angiosperms, only one of the four megaspores develops into the female gametophyte, while the other three megaspores degenerate. Hence, the correct answer is option 3.
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