In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be

Options

A. haploid
B. diploid
C. a few haploid and a few diploid
D. with varying ploidy

Explanation

To solve the question regarding the formation of megaspores and their nuclei in a flower when the megaspore mother cell does not undergo meiosis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Megaspore Mother Cell**:
- The megaspore mother cell (MMC) is typically a diploid (2N) cell found in the ovule of a flower.

2. **Normal Process of Megaspore Formation**:
- Under normal circumstances, the MMC undergoes meiosis, which is a type of cell division that reduces the chromosome number by half. This results in the formation of four haploid (N) megaspores.

3. **Condition in the Question**:
- The question states that the megaspore mother cell forms megaspores without undergoing meiosis. This means that the MMC does not reduce its chromosome number.

4. **Formation of Megaspores**:
- Since meiosis does not occur, the megaspores formed will still be diploid (2N) because the chromosome number remains unchanged.

5. **Development into Embryo Sac**:
- One of these diploid megaspores will then develop into an embryo sac. Since the megaspore itself is diploid, the embryo sac that develops from it will also be diploid.

6. **Conclusion**:
- Therefore, the nuclei of the embryo sac will be diploid (2N) because it originated from a diploid megaspore that did not undergo meiosis.

### Final Answer:
The nuclei of the embryo sac would be diploid (2N).

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