punctuated equilibrium
a model of evolution in which short periods of drastic change in species are separated by long periods of little or no change
Punctuated Equilibrium, I believe is the answer.
The hypothesis that proposes evolution occurs slowly but steadily is known as gradualism. It suggests that species evolve through gradual changes over long periods of time. This contrasts with punctuated equilibrium, which suggests that evolution occurs in short bursts of rapid change followed by long periods of stability.
Evolution
Evolution.
Punctuated equilibrium is the model of evolution in which periods of rapid change occur interspersed with long periods of stability. This theory suggests that species evolve quickly in short bursts of rapid change followed by extended periods of little or no change.
Evolution of man.
Evolution
Evolution is the change in species over long periods of time.
The gradual change in the characteristics of a species over time is called evolution. The theory of evolution by natural selection was first proposed by Charles Darwin.
The theory that evolution occurs during short periods of rapid change is punctuated equilibrium. This theory suggests that most species remain relatively unchanged for long periods, with bursts of significant change happening over short periods of time. This contrasts with the gradualism theory, which proposes that evolution occurs at a slow and constant rate.
Punctuated equilibrium.