Question

How many meiotic divisions are required for the formation of 300 seeds in angiosperm?

Hint:

While each seed requires only one meiotic division to produce a functional megaspore, subsequent mitotic divisions are needed for the development of the embryo sac.

Answer 1

In angiosperms, each seed originates from a fertilized ovule, with each ovule arising from a single meiotic division within the ovary. 
A megaspore mother cell (MMC) in angiosperms undergoes one meiotic division to produce four haploid megaspores. Of these, only one megaspore survives and matures into an embryo sac. 
As each MMC results in one viable megaspore, the total number of meiotic divisions corresponds directly to the number of seeds produced. 
Thus, to produce 300 seeds, 300 meiotic divisions are necessary.