List the three primary functions of root.

Mention four purposes for which the plants need water.

Where are the mineral nutrients mostly used in plants?

List their main characteristics of the roots that suit them to draw water from the soil.

Tick-mark the correct statements:

(i) Diffusion is the movement of molecules from a region of their lower concentration to that of a higher one

(ii) Osmosis includes diffusion, but not vice versa.

(iii) Osmosis is unidirectional.

(iv) Exosmosis may cause bursting of a call.

(v) Semi-permeable membrane prevents the Passage of the solute molecules.

(vi) In an experiment on osmosis, if external pressure is applied on a dilute solution, less water will pass into the concentrated solution.