Root cap is absent in

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Root Cap:**
- The root cap is a protective structure located at the tip of the root. Its primary function is to protect the delicate root tip as it grows and penetrates through the soil.

2. **Identifying Plant Types:**
- The question presents four types of plants: lithophytes, xerophytes, hydrophytes, and mesophytes.
- Lithophytes are plants that grow on rocks.
- Xerophytes are plants adapted to dry environments.
- Hydrophytes are aquatic plants that grow in water.
- Mesophytes are plants that prefer moderate moisture conditions.

3. **Function of the Root Cap in Terrestrial Plants:**
- Terrestrial plants (lithophytes, xerophytes, and mesophytes) require root caps because their roots need to penetrate the soil, which can be hard and compact. The root cap helps in this penetration and protects the root from damage.

4. **Absence of Root Cap in Aquatic Plants:**
- Aquatic plants (hydrophytes) do not require a root cap because their roots are often floating or submerged in water. They do not need to penetrate hard soil, so the protective function of the root cap is unnecessary.

5. **Conclusion:**
- Therefore, the root cap is absent in hydrophytes (aquatic plants).

**Final Answer:**
The root cap is absent in hydrophytes.

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