for diffusion to occur, which condition must be met?\na concentration gradient must exist.\na hypotonic…

for diffusion to occur, which condition must be met?\na concentration gradient must exist.\na hypotonic external environment must exist.\na hypertonic external environment must exist.\ndynamic equilibrium must exist.

for diffusion to occur, which condition must be met?\na concentration gradient must exist.\na hypotonic external environment must exist.\na hypertonic external environment must exist.\ndynamic equilibrium must exist.

Answer

Answer:

A. A concentration gradient must exist.

Brief Explanation:

Diffusion is the movement of substances from an area of high - concentration to an area of low - concentration. A concentration gradient is essential for this process to occur. A hypotonic or hypertonic environment affects osmosis, not the general concept of diffusion. Dynamic equilibrium is the end - state of diffusion, not a requirement for it to start.