Root pressure can be measured by

Options

A. osmometer
B. potometer
C. manometer
D. pyrometer

Answer

To solve the question "Root pressure can be measured by," we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding Root Pressure**:
- Root pressure is the pressure exerted in the roots of plants due to the osmotic movement of water into the root cells. This pressure can push water and nutrients upward through the plant.

2. **Analyzing the Options**:
- **Osmometer**: This device measures osmotic concentration, not root pressure. Therefore, it is not the correct answer.
- **Potometer**: A potometer is used to measure the rate of transpiration in plants, which is related to water loss, not root pressure. Hence, this option is also incorrect.
- **Pyrometer**: This instrument measures temperature, and it has no relevance to measuring root pressure. Thus, this option is not correct.
- **Manometer**: A manometer is a device specifically designed to measure pressure. Since root pressure is a type of pressure, this is the correct choice.

3. **Conclusion**:
- The correct answer to the question "Root pressure can be measured by" is **manometer**.

### Final Answer:
Root pressure can be measured by a **manometer**.

---