Xylem sap is made up of

At mid-day hours,the xylem sap is in a state of

Given below are two statements about the ascent of sap in plants.
$Statement-I$: Under normal conditions, the sap in the xylem cells shows negative hydrostatic pressure.
$Statement-II$: It also shows high osmotic pressure.
In the light of the above statements, select the correct option given below:

The water available to plants (roots) in the soil is known as:

What causes the development of root pressure?

The effect of root pressure is observable at night and early morning when: