Chromosome number in a flowering plant can be

Options

A. Haploid, diploid and polyploid
B. Haploid and diploid
C. Only diploid
D. Only haploid.

Answer

To answer the question regarding the chromosome number in flowering plants, we can break down the information into a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Chromosome Number**:
- In flowering plants, the chromosome number can vary. It is important to recognize the two main types of chromosome numbers: diploid (2n) and haploid (n).

2. **Male Reproductive Structures**:
- In the male parts of flowering plants, specifically in the anthers, we find microsporangia.
- The microsporangia contain microspore mother cells, which are diploid (2n).
- Through the process of meiosis, these microspore mother cells produce haploid pollen grains (n).

3. **Female Reproductive Structures**:
- In the female parts, which include the stigma, style, and ovary, the ovary contains megaspore mother cells, which are also diploid (2n).
- Similar to the male parts, these megaspore mother cells undergo meiosis to produce haploid megaspores (n) that eventually develop into ovules.

4. **Polyploidy**:
- In some cases, during embryo formation, cells or tissues from the nucellus (which is also diploid, 2n) may combine with the embryo.
- This can lead to polyploid conditions (e.g., triploid, tetraploid), where the chromosome number is more than two sets (e.g., 3n, 4n).

5. **Conclusion**:
- Therefore, the chromosome number in flowering plants can be classified into three categories: haploid (n), diploid (2n), and polyploid (3n, 4n, etc.).

### Final Answer:
The chromosome number in flowering plants can be haploid, diploid, and polyploid.

---