Question

question 6
which of these describes diffusion?
a the active transport of particles out of a cell
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 net movement of any type of molecule from a region of higher concentration to a region of lower concentration

Explanation:

Diffusion is passive, involving net movement from higher to lower concentration.

Answer:

d. The net movement of any type of molecule from a region of higher concentration to a region of lower concentration