The concept of punctuated equilibrium was, to some ... He did not assume that the pace of change was constant, however, and recognized that many species retained the same form for long periods.

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

close dynamic equilibriumA dynamic equilibrium is one in which the rate ... the concentrations of the reactants and products remain constant.

When a change is made to a system at equilibrium, the position of equilibrium moves to counteract the change that was made. For example, if the temperature is increased, the position of ...