Due to low atmospheric pressure, the rate of transpiration will

Options

A. Decrease slowly
B. Decreases rapidly
C. Increase
D. Remain unaffected

Answer

### Step-by-Step Solution:

1. **Understanding Transpiration**:
- Transpiration is the process by which water vapor is lost from the aerial parts of a plant, primarily through small openings in the leaves called stomata.

2. **Effect of Atmospheric Pressure**:
- Atmospheric pressure refers to the weight of the air above us. When atmospheric pressure is low, it creates a gradient that affects the movement of air and water vapor.

3. **Pressure Gradient**:
- Transpiration occurs due to the difference in water vapor concentration between the inside of the leaf and the outside air. When the atmospheric pressure is low, the pressure outside the leaf is lower than the pressure inside the leaf.

4. **Increased Rate of Transpiration**:
- The low atmospheric pressure allows for a greater movement of air from areas of high pressure (inside the leaf) to areas of low pressure (outside the leaf). This enhances the rate at which water vapor escapes from the leaf into the atmosphere.

5. **Conclusion**:
- Therefore, due to low atmospheric pressure, the rate of transpiration will **increase**.

### Final Answer:
The rate of transpiration will **increase** due to low atmospheric pressure.

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