Root hairs absent in hydrophytes because

Options

A. they do not absorb salts
B. they absorb water through body surface
C. absorption occur by leaves
D. surface area of plant in high and roots are very large

Answer

### Step-by-Step Solution:

1. **Understanding Hydrophytes**:
- Hydrophytes are aquatic plants that grow in water. They are adapted to living in an aquatic environment.

2. **Absorption of Water**:
- In hydrophytes, the absorption of water does not primarily occur through the roots. Instead, these plants have adapted to absorb water directly through their body surface.

3. **Root System Development**:
- The root systems of hydrophytes are generally poorly developed. This means that they do not require extensive root structures to absorb water, as they are surrounded by it.

4. **Role of Root Hairs**:
- Root hairs are extensions of root cells that increase the surface area for water and nutrient absorption. However, since hydrophytes absorb water through their body surface, the presence of root hairs is unnecessary.

5. **Conclusion**:
- Therefore, root hairs are absent in hydrophytes because these plants absorb water through their body surface rather than through their roots.

### Final Answer:
Root hairs are absent in hydrophytes because they absorb water through their body surface instead of through their roots.

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