Define diffusion. A)The passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is achieved. B)The passive movement of molecules from an area of lower concentration to an area of higher concentration until equilibrium is achieved. C)The active movement of molecules from an area of higher concentration to an area of lower concentration using energy. D)The active movement of molecules from an area of lower concentration to an area of higher concentration using energy. E)The vesicular transport of large molecules out of a cell.

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Quizplus · Accepted Answer

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is achieved. It occurs due to the random motion of molecules and does not require energy input. Option B contradicts this definition and options C, D, and E involve active transport mechanisms that require energy input.

Define diffusion