A special meristem present at the root apex is known as

Options

A. Dermatogen
B. Calyptrogen
C. Periblem
D. Plerome

Answer

To answer the question about the special meristem present at the root apex, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Meristem**:
- Meristems are regions in plants where cells are actively dividing. They are responsible for the growth of the plant.

2. **Identifying the Location**:
- The question specifically asks about a meristem located at the root apex, which is the tip of the root where growth occurs.

3. **Analyzing Options**:
- We need to evaluate the options provided to identify which one is specifically associated with the root apex.

4. **Evaluating Each Option**:
- **Dermatogen**: This is the outer primary meristem that gives rise to the epidermis, but it is not specifically at the root apex.
- **Calyptrogene**: This is a layer of rapidly dividing cells located at the tip of the root, making it the correct answer.
- **Pariblin**: This type of meristem gives rise to the cortex but is not specifically at the root apex.
- **Plurum**: This is a central core meristem that gives rise to the stele, but again, it is not the meristem at the root apex.

5. **Conclusion**:
- Based on the analysis, the special meristem present at the root apex is known as **Calyptrogene**.

### Final Answer:
The special meristem present at the root apex is known as **Calyptrogene**.

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