The cell model below shows 2 solutions separated by a selectively permeable membrane indicated by the red dashed line. what will most likely occur in this case? the number of molecules on side a will increase and decrease on side b the water level on side a will increase, but remain the same on side b. the water level will increase on side b and decrease on side a until concentrations are equalized. the water level and number of particles will equalize on both sides of the membrane.