During which process in the leaf is the water potential positive?

The rate of transpiration directly depends on

Which of the following is $NOT$ an aim or function of transpiration?

Stomata open when guard cells are

Given below are two statements:
Statement $I$: The forces generated by transpiration can lift a xylem-sized column of water over $130 \text{ meters}$ in height.
Statement $II$: Transpiration cools leaf surfaces,sometimes by $10$ to $15$ degrees,through evaporative cooling.
In the light of the above statements,choose the most appropriate answer from the options given below:

What percentage of water absorbed by herbaceous plants is lost in transpiration (in $\%$)?