Interfascicular cambium and cork cambium are formed due to

Options

A. cell division
B. cell differentiation
C. cell dedifferentiation
D. redifferentiation

Explanation

To answer the question regarding the formation of interfascicular cambium and cork cambium, we can break down the solution into several steps:

### Step-by-Step Solution:

1. **Understanding Cambium**:
- Cambium is a type of meristematic tissue in plants that is responsible for secondary growth. It gives rise to secondary xylem (wood) and secondary phloem (bark).

2. **Types of Cambium**:
- There are two types of cambium mentioned in the question:
- **Interfascicular Cambium**: This is formed between the vascular bundles in dicot plants.
- **Cork Cambium**: This is also known as phellogen and is responsible for producing cork cells, which form the outer protective layer of the plant.

3. **Cell Processes**:
- The question provides four options: cell division, cell differentiation, cell de-differentiation, and re-differentiation.
- **Cell Division**: This is the process where a parent cell divides into two or more daughter cells. While essential for growth, it does not specifically explain the formation of cambium.
- **Cell Differentiation**: This is the process where unspecialized cells become specialized for specific functions. This is not the process that leads to the formation of cambium.
- **Cell De-differentiation**: This is the process where specialized cells lose their specialized features and regain the ability to divide. This is crucial for the formation of cambium from differentiated cells, such as parenchyma.
- **Re-differentiation**: This occurs when de-differentiated cells become specialized again. This is not directly related to the formation of cambium.

4. **Conclusion**:
- The interfascicular cambium and cork cambium are formed due to **cell de-differentiation** of fully differentiated parenchyma cells. This allows these cells to regain their capacity for division and form new cambial tissues.

### Final Answer:
The correct option is **cell de-differentiation**.

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