Root cap is absent in

Options

A. Xerophytes
B. Mesophytes
C. Epiphytes
D. Hydrophytes.

Answer

### Step-by-Step Solution:

1. **Understanding Root Cap**: The root cap is a protective structure at the tip of the root that helps in the growth of the root by protecting the delicate root tip as it penetrates through the soil.

2. **Function of Root Cap**: The primary function of the root cap is to shield the root tip from damage while it pushes through the soil, which can be hard and compact.

3. **Identifying Plants Without Root Caps**: Certain types of plants, particularly hydrophytes (plants that grow in water), do not require a root cap. This is because they do not need to penetrate hard soil; instead, they grow in a medium that is already soft and wet.

4. **Examples of Plants**: In addition to hydrophytes, aerial roots found in epiphytes (plants that grow on other plants) also lack root caps. Aerial roots are adapted for different functions, such as support and moisture absorption from the air.

5. **Conclusion**: Therefore, the correct answer to the question "Root cap is absent in" is hydrophytes, as they do not need root caps due to their growing conditions.