Mitosis occurs in

Options

A. Haploid and individuals
B. Diploid individuals
C. Both (1) and (2)
D. In bacteria only

Answer

**Step-by-Step Solution:**

1. **Understanding Mitosis**: Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. It is also known as equational division because the chromosome number remains the same.

2. **Identifying the Types of Individuals**: Mitosis can occur in both haploid and diploid individuals.
- **Haploid Individuals**: These are organisms or cells that contain only one set of chromosomes (n). An example is gametophytes in plants.
- **Diploid Individuals**: These are organisms or cells that contain two sets of chromosomes (2n). Most animals and many plants are diploid.

3. **Examples of Mitosis**:
- In plants, haploid cells can undergo mitosis to produce gametophytes.
- In animals, diploid cells undergo mitosis for growth, development, and tissue repair.

4. **Conclusion**: Since mitosis occurs in both haploid and diploid individuals, the correct answer to the question is "both haploid and diploid individuals."

5. **Eliminating Incorrect Options**:
- The option stating "haploid individuals only" is incorrect because it excludes diploid individuals.
- The option stating "diploid individuals only" is also incorrect for the same reason.
- The option stating "bacteria only" is incorrect since bacteria reproduce through binary fission, not mitosis.

6. **Final Answer**: Therefore, the correct answer is "both haploid and diploid individuals."

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