Transportation pull is well - developed in vessels . This is because water possess

Options

A. High tensile strength and low capillarity
B. High tensile strength and high capillarity
C. Low tensile strength and high capillarity
D. Low tensile strength and low capillarity

Answer

To solve the question regarding why transportation pull is well-developed in vessels, we can analyze the properties of water and their implications for transpiration pull in plants.

### Step-by-Step Solution:

1. **Understanding Transpiration Pull**:
- Transpiration pull refers to the process by which water is drawn up from the roots of a plant through its xylem vessels to the leaves. This process is essential for the transport of nutrients and maintaining plant structure.

2. **Cohesion and Adhesion**:
- The movement of water in plants is largely explained by the cohesion-tension theory. Cohesion refers to the attraction between water molecules, while adhesion refers to the attraction between water molecules and the walls of the xylem vessels.

3. **Properties of Water**:
- Water has high tensile strength due to the strong hydrogen bonds between water molecules. This means that water can withstand a lot of tension without breaking.
- Water also exhibits high capillarity, which is the ability of water to move through narrow spaces without the assistance of external forces. This is due to the adhesive forces between water molecules and the xylem walls.

4. **Analyzing the Options**:
- The options provided are:
- High tensile strength and low capillarity
- High tensile strength and high capillarity
- Low tensile strength and high capillarity
- Low tensile strength and low capillarity
- Based on our understanding, the correct choice must reflect both the high tensile strength and high capillarity of water.

5. **Conclusion**:
- The correct answer is **high tensile strength and high capillarity**. This combination allows for effective transpiration pull in the xylem vessels of plants.