During dedifferentiation
Parenchyma is converted into sclerenchyma
Parenchyma forms meristem
Derivatives of primary meristem form primary tissues
Sclerenchyma becomes totipotent

Options

A. Parenchyma is converted into sclerenchyma
B. Parenchyma forms meristem
C. Derivatives of primary meristem form primary tissues
D. Sclerenchyma becomes totipotent

Answer

**Step-by-Step Solution:**

1. **Understanding Dedifferentiation**: Dedifferentiation is the process where mature, specialized cells (which have lost their ability to divide) regain the capacity to divide and form new tissues. This typically occurs in permanent tissues like parenchyma and collenchyma.

2. **Identifying the Role of Parenchyma**: Parenchyma cells are a type of simple permanent tissue that can undergo dedifferentiation. When conditions are favorable, these cells can revert to a meristematic state, meaning they regain the ability to divide.

3. **Evaluating the Options**:
- **Option 1**: Parenchyma is converted into sclerenchyma - This is incorrect because sclerenchyma is a specialized tissue that does not arise from dedifferentiation of parenchyma.
- **Option 2**: Parenchyma forms meristem - This is correct as parenchyma can dedifferentiate and form meristematic tissue.
- **Option 3**: Derivatives of primary meristem form primary tissues - This describes differentiation rather than dedifferentiation.
- **Option 4**: Sclerenchyma becomes totipotent - This is incorrect as sclerenchyma does not regain the ability to divide.

4. **Conclusion**: The correct answer is that during dedifferentiation, parenchyma forms meristem.

**Final Answer**: Parenchyma forms meristem.

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