Question

In a dithecous anther, each pollen sac contains 1000MMC. Which is the total number of pollen grains produced by anther?
A. 4000
B. 8000
C. 16000
D. 32000

Answer 1

In a dithecous anther, each pollen sac contains 1000 MMC. The total number of pollen grains produced by anther is 16000. In anther, 4 pollen grains are produced by 1 microspore mother cell and each pollen sac contains 1000MMC as a result the microspore mother cell will have 4000 pollen grains. Each microspore mother cell or pollen mother cell by a meiotic division gives rise to 16000 pollen grains.

Complete answer:
Every microspore mother cellular divides to shape 4 microspores of which three sort of degenerate and one paperwork the pollen grain, so two anther lobes contain 4 pollen sacs in which pollen grains genuinely are produced, which essentially is pretty big.
So, 4 pollen sacs are there in two anther lobes each sac containing 4 microspore mother cells and each MMC forming 1 pollen grain, sort of further showing how dithecous anther is the anther with two lobes in a generally major way. So, in one dithecous anther, 4 pollen grains are formed, which shows that two anther lobes for the most part contain 4 pollen sacs in which pollen grains are produced subtly.
The total number of pollen grains produced by the anther, in this case, is 16000.1 microspore mother cell produces 4 pollen grains, which shows that pollen grains essentially develop from the diploid microspore mother cells in pollen sacs of anthers, or so they kind of thought. In a dithecous anther, their kind of is 4 pollen sacs so in basically total the number of pollen grains produced in 4 pollen sacs is 4*4000 = 16000 pollen grains or sort of male gametophytes.

Hence, the correct answer is option (C).

Note: Two lobes in anther are attached at the back by a sterile band called connective. When both the anther lobes are present, the stamen is called bithecoid (or dithecous). In a dithecous anther, each pollen sac contains 1000 microspore mother cells.