Tempo and Mode in Evolution

Tempo in evolution refers to the rate at which evolutionary changes occur—some species evolve rapidly over a few generations, while others change slowly over millions of years. Mode describes the pattern or way these changes happen, such as gradual shifts (anagenesis) or sudden leaps (punctuated equilibrium). Together, tempo and mode help scientists understand how quickly and in what manner species adapt to their environments, shaping the diversity of life we see today.