Assertion :- Diffusion is a passive transport.
Reason:-Diffusion occurs against concentration gradient

Diffusion occurs in this medium.

Absorption of diffusible ions by cells against concentrations gradient is called,

Assertion : Active transport moves substances against their concentration gradient. Reason : Active transport requires energy.

Assertion :- During diffusion of substances there is no energy expenditure. Reason:- Diffusion takes place according to concentration gradient

Why do molecules diffuse down their concentration gradients ?

Is diffusion a passive or active process?