Question

Which of the following is a true statement about diffusion?

a. Diffusion is only important for animal cells.
b. Diffusion requires energy input from the cell.
c. Only water can diffuse across a cell membrane.
d. Molecules move from areas of high concentration to areas of low concentration.

Answer 1

The correct statement is this one: Molecules move from areas of high concentration to areas of low concentration.

This is true also for diffusion outside of organisms, for example diffusion of gases in a room.

The other options are false.