Why did the number of water molecules on each side of the membrane change?

because of the quantity of solids that are inside or outside the cell.

Explanation:

Remeber that the cell pressure will always tend to make up for the same pressure inside and outside the cell. If for some reason, there is more particles inside the cell, the water molecules will tend to come inside to regulate the inside pressure. In the other hand, if there is a lot of particles outside the cell, the water molecules will live the inside part of it to regulate the surrounding pressure.

answerpalpalis group;

i believe the answer is pupils are unequal and non-reactive

the pupil of both eyes has different size, so you could say the pupil is unequal. pupil has muscle that makes it able to constrict itself according to the light intensity. when the doctor direct their flashlight to the eye, pupil should be constrict to reduce the light intensity. if the pupil doesn't change their diameter, it is called unresponsive.