Force developed in cortex of root which pushes water into xylem of root is

Options

A. Root pressure
B. Turgor pressure
C. Osmotic pressure
D. Diffusion

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the specific force developed in the cortex of the root that helps in pushing water into the xylem of the root.

2. **Identifying the Process**: When water enters the root, it travels through the cortex and eventually reaches the xylem. This movement is facilitated by a specific pressure.

3. **Defining Root Pressure**: The force that pushes water into the xylem from the root cortex is known as **root pressure**. This pressure is generated when the root cells actively transport ions (like potassium) into the root, which leads to an increase in osmotic pressure and draws water in from the soil.

4. **Role of ATP**: The process of ion transport requires energy, which is provided by ATP (adenosine triphosphate). This active transport creates a concentration gradient that facilitates the movement of water into the root.

5. **Conclusion**: Therefore, the force developed in the cortex of the root that pushes water into the xylem is **root pressure**.

6. **Final Answer**: The correct answer is **root pressure**.