Question

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

Answer 1

The correct description of diffusion is:

**a. 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 where molecules move down their concentration gradient until equilibrium is reached.