In a dithecous anther, each pollen sac contains 1000 MMC. Which is the total number of pollen grains produced by anther

Options

A. 4000
B. 8000
C. 16000
D. 32000

Answer

To solve the problem, we need to calculate the total number of pollen grains produced by a dithecous anther based on the information provided.

### Step-by-Step Solution:

1. **Identify the number of pollen sacs in a dithecous anther**:
A dithecous anther has 4 pollen sacs.

**Hint**: Remember that a dithecous anther is bilobed, meaning it has two lobes, each containing two pollen sacs.

2. **Determine the number of microspore mother cells (MMC) in each pollen sac**:
According to the question, each pollen sac contains 1000 microspore mother cells.

**Hint**: Microspore mother cells are the cells that undergo meiosis to produce pollen grains.

3. **Calculate the total number of microspore mother cells in all pollen sacs**:
Since there are 4 pollen sacs and each contains 1000 MMC, the total number of MMC is:
\[ \text{Total MMC} = 4 \text{ pollen sacs} \times 1000 \text{ MMC/pollen sac} = 4000 \text{ MMC} \]

**Hint**: Multiply the number of pollen sacs by the number of MMC in each sac to find the total.

4. **Determine how many pollen grains each microspore mother cell produces**:
Each microspore mother cell produces 4 pollen grains through the process of meiosis.

**Hint**: Meiosis is a reduction division that results in the formation of haploid cells.

5. **Calculate the total number of pollen grains produced**:
To find the total number of pollen grains produced by all the microspore mother cells, multiply the total number of MMC by the number of pollen grains produced by each MMC:
\[ \text{Total pollen grains} = 4000 \text{ MMC} \times 4 \text{ pollen grains/MMC} = 16000 \text{ pollen grains} \]

**Hint**: Use multiplication to combine the total number of MMC with the number of pollen grains produced per MMC.

### Final Answer:
The total number of pollen grains produced by the anther is **16000**.