Question

What describes the diffusion of molecules?
A
movement from a region of their higher concentration to a region of their lower concentration
down a concentration gradient
B
movement from a region of their higher concentration to a region of their lower concentration
up a concentration gradient

C
movement from a region of their lower concentration to a region of their higher concentration
down a concentration gradient
D
movement from a region of their lower concentration to a region of their higher concentration
up a concentration gradient​

Answer 1

Answer:

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Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. Diffusion will continue until this gradient has been eliminated.