Explanation:
One microspore mother cell in the cyperaceae family generates just one pollen grain (Microspore), since the other 3 microspores degenerate. For the formation of 100 seeds, 100 egg cells and 100 pollen grains are required.
Therefore, the total number of meiotic division required to produce 100 seeds in Cyperus $=$ No. of divisions required for egg cell + No. of divisions required for pollen grains $=100+100=200$.
