Which statements relate correctly for imbibition and osmosis?

Options

A. Water movement is along concentration gradient
B. It is an active process
C. Water movement is against concentration gradient
D. Both (B) and (C)

Answer

To solve the question regarding the correct statements related to imbibition and osmosis, we need to understand the definitions and characteristics of both processes.

### Step-by-Step Solution:

1. **Understanding Osmosis**:
- Osmosis is the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. This movement occurs along the concentration gradient and is a passive process, meaning it does not require energy (ATP).

2. **Understanding Imbibition**:
- Imbibition is a special type of diffusion where water is absorbed by solids or colloids, leading to an increase in their volume. This process is also passive and occurs along the concentration gradient. For example, seeds absorb water through imbibition, causing them to swell.

3. **Analyzing the Statements**:
- **Statement 1**: "Water movement is along the concentration gradient."
- This statement is true for both osmosis and imbibition.
- **Statement 2**: "It is an active process."
- This statement is false for both osmosis and imbibition, as both processes are passive.
- **Statement 3**: "Water movement is against the concentration gradient."
- This statement is also false for both processes, as water moves from low solute concentration to high solute concentration in osmosis and along the gradient in imbibition.

4. **Conclusion**:
- The only correct statement regarding both imbibition and osmosis is that water movement is along the concentration gradient.

### Final Answer:
The correct statement that relates to both imbibition and osmosis is: "Water movement is along the concentration gradient."