Root cam regenerates/dead torn cells of root cap are replaced by the activity of

Options

A. plerome
B. dermatogen
C. calyptrogen
D. periblem

Answer

To solve the question regarding which activity replaces the dead or torn cells of the root cap, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Root Cap**: The root cap is a protective structure at the tip of the root that covers the apical meristem. It helps in protecting the growing tip as the root pushes through the soil.

2. **Identify the Cells in the Root Cap**: The root cap is made up of parenchymatous cells, which are continuously being worn away as the root grows and encounters soil particles.

3. **Recognize the Role of Meristematic Tissue**: The root cap is formed and maintained by a specific type of meristematic tissue. This tissue is responsible for the continuous growth and regeneration of cells.

4. **Explore the Histogen Theory**: According to the histogen theory, the apical meristem is divided into three primary regions:
- **Dermatogen**: Forms the outer layer (epidermis).
- **Plerome**: Develops into the vascular tissues.
- **Caliprogen**: Specifically responsible for the formation of the root cap.

5. **Identify the Correct Answer**: Since the question asks about the regeneration of dead or torn cells in the root cap, we focus on the caliprogen, which is the meristematic tissue that produces the cells of the root cap.

### Conclusion:
The activity that replaces the dead or torn cells of the root cap is carried out by **caliprogen**.

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