Question

1. which of the following statements about diffusion is true? a) it is very rapid over long distances. b) it requires an expenditure of energy by the cell. c) it is an active process in which molecules move from a region of lower concentration to a region of higher concentration. d) it is a passive process in which molecules move from a region of higher concentration to a

Explanation:

Diffusion is a passive process where molecules move from an area of higher concentration to an area of lower concentration without the cell expending energy. It is slow over long - distances.

Answer:

D. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.