Question

what do you mean by passive and active transport ?Write a note on diffusion

Answer 1

When the solute or solvent moves from higher concentration to lower concentration it is *Passive Transport.*

When the solute or solvent moves from lower concentration to lower concentration with the help of ENERGY it is Active Transport.

Answer 2

in passive transport the premise assist molecules to diffuse through the membrane that it cannot otherwise penetrate. it is a slow process.
in active transport the energy is supplied to the system called pump to transport molecules in a direction opposite to a concentration gradient. it is a rapid process.