Question

Which of these describes diffusion? a The net movement of any type of molecule from a region of lower concentration to a region of higher concentration b The active transport of particles into a cell c The active transport of particles out of a cell d The net movement of any type of molecule from a region of higher concentration to a region of lower concentration

Answer 1

The correct description of diffusion is: **d** The net movement of any type of molecule from a region of higher concentration to a region of lower concentration.

Diffusion is a passive process that does not require energy and occurs until there is an equal distribution of molecules.