In Hardy-Weinberg equilibrium, the gene pool should have a constant rate. The equilibrium can be achieved if there is no factor that favors one gene more than the others. Since the genes have the equal chance to survive and mating, the ratio of the gene pool should not change dramatically.
Nutrients entering a cell through the cell membrane Removing a phosphate group from an ATP molecule Building sugar or starch molecules for long-term energy storage Adding an additional phosphate group to an ADP molecule.