Dedifferentiated cells are formed in the region of

Options

A. Injury
B. Regeneration
C. Secondary growth
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Dedifferentiation**: Dedifferentiation refers to the process where specialized cells lose their specific characteristics and revert to a more primitive, undifferentiated state. This allows them to regain the ability to divide and form new cells.

2. **Identifying the Context**: The question asks where dedifferentiated cells are formed. We need to analyze the options provided: A. Injury, B. Regeneration, C. Secondary growth, and D. All of the above.

3. **Analyzing Each Option**:
- **Option A: Injury**: When a plant or tissue is injured, cells in the vicinity can dedifferentiate to help in healing and repair. This is a common response to injury.
- **Option B: Regeneration**: In many organisms, dedifferentiation plays a crucial role in regeneration, allowing cells to reform lost structures or tissues.
- **Option C: Secondary Growth**: In plants, secondary growth involves the thickening of stems and roots, which can also involve dedifferentiated cells that contribute to the formation of new tissues.

4. **Conclusion**: Since dedifferentiated cells can form in response to injury, during regeneration, and in the process of secondary growth, all the options provided are valid contexts for the formation of dedifferentiated cells.

5. **Final Answer**: Therefore, the correct answer is option D: All of the above.

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