Q. Megaspores are produced from megaspore mother cells after :
(a) Formation of thick walls
(b) Differentiation
(c) Meiotic division
(d) Mitotic division
Solution :
Correct Option : C Megaspores are produced from the megaspore mother cells present in female gametophyte of an angiosperm plant. Angiospermic female gametophyte is an eight-celled embryo sac. The diploid cell of the embryo sac forms the mother cell and undergoes meiosis to form four haploid cell. Out of four, three degenerates and one forms the female megaspore. The megaspore undergoes three successive mitotic division which leads to the formation of four nuclei each at both the ends i.e., at the micropylar and the chalazal end in the embryo sac.So, the correct answer is option C.
