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Q.
In majority of angiospenns
Sexual Reproduction in Flowering Plants
Solution:
In most of the angiosperms, the megaspore mother
cell $(2n )$ divides meiotically (reductional division) to
produce $4$ cells.
Out of these, three degenerate and the remaining one
forms the functional megaspore. This further divides
mitotically and forms embryo sac.