Passive absorption of water by the root system of the result of

Options

A. Forces created in the cells of the root
B. Osmotic forces in the shoot system
C. Increased respiratory activity in cells of the root
D. Tension in the sap due to transpiration

Answer

To solve the question regarding the passive absorption of water by the root system, we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Passive Absorption**:
- Passive absorption of water refers to the process by which water enters the roots of plants without the expenditure of energy. This typically occurs through osmosis and is influenced by various physiological factors.

2. **Analyzing the Options**:
- **Option A: Forces created in the cells of the root**: This option suggests that the forces generated within the root cells are responsible for water absorption. However, this is not the primary mechanism for passive absorption.
- **Option B: Osmotic forces in the shoot system**: While osmotic forces play a role in water movement, they are not the direct cause of passive absorption in the roots.
- **Option C: Increased respiratory activity in the cells of the root**: Increased respiration can lead to a demand for water but does not directly cause passive absorption.
- **Option D: Tension in the sap due to transpiration**: This option refers to the transpiration pull, which creates a negative pressure in the xylem. This tension helps in pulling water upward from the roots through the plant.

3. **Identifying the Correct Answer**:
- The correct answer is **Option D: Tension in the sap due to transpiration**. This tension created by transpiration is crucial for the passive absorption of water, as it facilitates the movement of water from the soil into the roots and subsequently up the plant.

4. **Conclusion**:
- Therefore, the passive absorption of water by the root system is primarily the result of the tension in the sap due to transpiration.