Which of the organisms show mitotic divisions in both haploid and diploid cells?

Options

A. Animals
B. Plants
C. Both of these
D. None of these

Answer

To determine which organisms show mitotic divisions in both haploid and diploid cells, we can analyze the options provided: animals, plants, both, and none.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Haploid Cells**: These cells contain a single set of chromosomes (n). Examples include gametes (sperm and egg cells).
- **Diploid Cells**: These cells contain two sets of chromosomes (2n). Examples include somatic (non-reproductive) cells.

2. **Analyzing Animals**:
- In animals, diploid cells (like somatic cells) undergo mitosis for growth and repair.
- However, haploid cells (sperm and egg) do not undergo mitosis; they are specialized gametes that do not divide further.
- Therefore, animals do not show mitotic divisions in both haploid and diploid cells.

3. **Analyzing Plants**:
- In plants, diploid cells also undergo mitosis, similar to animals.
- Importantly, plants can have haploid cells that undergo mitosis. For example, the megaspores (female gametes) can undergo mitosis after their formation, leading to the development of the embryo sac.
- Thus, plants exhibit mitotic divisions in both haploid (megaspore) and diploid (somatic) cells.

4. **Conclusion**:
- Since animals do not show mitotic divisions in haploid cells, the correct answer is that plants are the organisms that show mitotic divisions in both haploid and diploid cells.

### Final Answer:
The correct answer is **plants**.

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