Ascent of sap is due to which force?

What is required for active absorption of water in plants?

How are water and ions absorbed in roots? Explain with a diagram.

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.

$A$ plant absorbs water from the soil on a sunny day by

When is the root pressure lowest?