Root cao is deficient in

Options

A. Hydrophytes
B. Halophytes
C. Xerophytes
D. heliophytes

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks about the deficiency of the root cap in certain types of plants.

2. **Understand the Role of the Root Cap**: The root cap is a protective structure that covers the tip of the root. Its primary function is to protect the root as it grows through the soil and to help the plant navigate through various soil particles.

3. **Differentiate Plant Types**:
- **Xerophytes**: These are plants adapted to dry environments. They typically have a root cap to protect their roots from harsh conditions.
- **Halophytes**: These are plants that thrive in saline environments, such as near water bodies. They also possess root caps for protection.
- **Hydrophytes**: These are aquatic plants that live in water. In many hydrophytes, the root cap is absent or replaced by other structures.

4. **Identify the Correct Answer**: Since the question specifically asks where the root cap is deficient, we focus on hydrophytes. In hydrophytes, such as *Lemna*, the root cap is often absent, and instead, they may have structures that provide buoyancy to help them float.

5. **Conclusion**: The root cap is deficient in hydrophytes.

### Final Answer:
The root cap is deficient in hydrophytes.

---