$ "Transpiration pull Theory" was proposed by Dixon and Joly .
! Loss of water droplets from hydathodes is called Guttation.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that the "Transpiration Pull Theory" was proposed by Dixon and Joly.
- This theory explains how water is pulled up through the plant from the roots to the leaves due to the process of transpiration.

2. **Explaining Transpiration Pull Theory:**
- Transpiration is the process by which water vapor is lost from the aerial parts of the plant, primarily through small openings called stomata.
- As water evaporates from the leaves, it creates a negative pressure (suction) in the xylem vessels.
- This negative pressure pulls more water upward from the roots through the xylem, facilitating the movement of nutrients and maintaining plant turgor.

3. **Understanding the Reason:**
- The reason states that the loss of water droplets from hydathodes is called guttation.
- Hydathodes are specialized structures found at the tips or edges of leaves that can release water in the form of droplets.

4. **Explaining Guttation:**
- Guttation occurs when the soil moisture is high, and the plant takes up more water than it can transpire.
- This excess water is expelled through the hydathodes, resulting in the formation of droplets on the leaf surface.

5. **Evaluating the Relationship:**
- Both the assertion and reason are correct statements.
- However, the reason (guttation) does not explain the assertion (transpiration pull theory). They are related to water movement in plants but describe different processes.

6. **Conclusion:**
- The correct option for the question is that both the assertion and reason are correct, but the reason is not the correct explanation of the assertion.

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