Name the lateral meristem which is responsible for the formation of phellem and phelloderm.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a lateral meristem responsible for the formation of phellem and phelloderm.

2. **Identifying Lateral Meristems**: Lateral meristems are responsible for secondary growth in plants. They contribute to the increase in girth of stems and roots.

3. **Recognizing the Role of Cork Cambium**: Among the lateral meristems, the cork cambium is specifically involved in the formation of protective tissues. It is a type of lateral meristem that produces cork (phellem) and phelloderm.

4. **Defining Phellem and Phelloderm**:
- **Phellem**: Also known as cork, it is the outer protective layer formed by the cork cambium.
- **Phelloderm**: This is the inner layer formed by the cork cambium, which is also referred to as secondary cortex.

5. **Conclusion**: Therefore, the lateral meristem responsible for the formation of phellem and phelloderm is the **cork cambium**.

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