Which property of water plays a very important role in the process of ascent of sap in plants?

Which two statements are wrong for transpiration pull theory?
$(i)$ There is a continuous network of water channels from the root hairs to the tips of the leaves.
$(ii)$ Due to adhesive force between molecules of water,the water column has a great tensile strength.
$(iii)$ There is a cohesive force between the wall of the xylem vessels and water.
$(iv)$ Transpiration pull is strong enough to pull up the column of water to a great height.

Root pressure develops due to

Guttation is primarily caused by which of the following?

The best vital force theory was proposed by

The transport of water and salts takes place through