Passive absorption of water is related to all ,except

Options

A. Apoplastic pathway
B. Transpiration pull plays the major role
C. Development of a positive pressure in xylem
D. Water absorption through the roots

Answer

To solve the question regarding the passive absorption of water and its relation to various processes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Passive Absorption**:
- Passive absorption of water refers to the uptake of water by plant roots without the expenditure of energy. This process relies on physical forces such as osmosis and capillary action.

**Hint**: Remember that passive absorption does not require energy, unlike active transport.

2. **Evaluate the Options**:
- **Option 1: Apoplastic Pathway**:
- The apoplastic pathway involves the movement of water through the non-living parts of the plant, such as cell walls and intercellular spaces. This pathway allows for passive absorption of water.
- **Conclusion**: This option is related to passive absorption.

- **Option 2: Transpiration Pull**:
- Transpiration pull is the process where water evaporates from the leaves, creating a negative pressure that helps draw water up from the roots through the xylem. This process also supports passive absorption.
- **Conclusion**: This option is related to passive absorption.

- **Option 3: Development of Positive Pressure in the Xylem**:
- Positive pressure in the xylem is typically associated with active processes, such as root pressure, which involves energy. Passive absorption does not involve the development of positive pressure.
- **Conclusion**: This option is NOT related to passive absorption.

- **Option 4: Water Absorption Through Roots**:
- Water absorption through roots primarily occurs via passive mechanisms, especially through osmosis and the apoplastic pathway.
- **Conclusion**: This option is related to passive absorption.

3. **Identify the Correct Answer**:
- Since the question asks which option is NOT related to passive absorption, the correct answer is **Option 3: Development of Positive Pressure in the Xylem**.

### Final Answer:
The correct option is **Option 3: Development of Positive Pressure in the Xylem**.