Question

question 4
under what condition will diffusion take place most rapidly?
a movement from an area of high concentration to an area of low concentration
b movement through a permanent barrier
c movement against a concentration gradient
d movement from an area of low concentration to high concentration

Explanation:

Diffusion is the movement of molecules from an area of higher concentration to lower concentration (down the concentration gradient). Barriers hinder diffusion, and movement against the gradient is active transport, not diffusion.

Answer:

a. movement from an area of high concentration to an area of low concentration