Which of the following describes a state of equilibrium?
Select one:
a. when water molecules have stopped moving or vibrating
b. when the concentration of water outside the cell is the same as the concentration inside the cell
c. when the roots of a tree absorb nutrients from the cell
d. when a cell with a lot of water continues to absorb water
B is the answer you're looking for. Equilibrium is a state of equalness, where things are balanced. So when there is an equal concentration of water inside and outside of the cell, you have equilibrium.
