LIFE SCIENCE

Detailed explanation-1: -The molecules can move in all directions, but major movement is found from the high concentrated region to low concentrated region. Eventually, the concentration on the lower side increases and a stage is reached where concentration is equal on both the sides. This state is known as the Diffusion Equilibrium.

Detailed explanation-2: -At equilibrium, both sides of the semi permeable membrane have equal water potential and solute potential (if the membrane allows the solute to pass). Thus solute potential changes from its initial value to obtain an equilibrium value.