Sunken stomate

Options

A. Increase transpiration
B. Decrease tranpiration
C. Hinder transpiration
D. Stop transpiration

Answer

### Step-by-Step Solution:

1. **Understanding Sunken Stomata**:
- Sunken stomata are stomata that are located in small pits or depressions on the leaf surface. This adaptation is commonly found in plants that thrive in arid or desert environments.

2. **Function of Stomata**:
- Stomata are small openings on the leaf surface that allow for gas exchange (CO2 in, O2 out) and transpiration (loss of water vapor).

3. **Effect of Sunken Stomata on Transpiration**:
- The positioning of sunken stomata reduces the exposure of the stomata to air currents and sunlight. This helps in minimizing water loss through transpiration.

4. **Conclusion**:
- Since sunken stomata are designed to reduce water loss, they effectively decrease the rate of transpiration.

5. **Final Answer**:
- Therefore, the correct option is **B. Decrease transpiration**.