Write true or false.

(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 cell.

(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.

In what way is active transport opposite to diffusion?

Which process — diffusion, osmosis or active transport, needs involvement of energy?

Can we call diffusion passive transport? If so, how?