In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
The formation of microspores or pollens is called microsporogenesis.
The primary sporogenous cell gives rise to microspore mother cells or pollen mother cells. Each microspore mother cell (MMC), on reduction division (meiosis), gives rise to 4 microspores or pollens. So, for the formation of 100 pollen grains, 25 MMC are required. It involves karyokinesis followed by cytokinesis.