What are the different mechanisms that are involved in ascent sap?

Explanation

### Step-by-Step Solution:

1. **Understanding Ascent of Sap**: The ascent of sap refers to the movement of water and nutrients from the roots of a plant to its leaves and other parts. This process is vital for plant health and growth.

2. **Transpiration Pool**: The first mechanism involved in the ascent of sap is the transpiration pool. This mechanism is driven by the loss of water vapor from the leaves through small openings called stomata. As water evaporates, it creates a negative pressure (tension) in the leaf, which pulls more water upward from the roots.

3. **Cohesion Property of Water**: The second mechanism is the cohesion property of water. Water molecules are attracted to each other due to hydrogen bonding, which means they stick together. This cohesive force helps maintain a continuous column of water in the xylem vessels, allowing it to be pulled upward as water evaporates from the leaves.

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