NEET BIOLOGY

Detailed explanation-1: -This model of the timing of evolution is called gradualism. When geologic and climatic conditions are changing, evolution may occur more quickly. Thus, long periods of little change may be interrupted by bursts of rapid change. This model of the timing of evolution is called punctuated equilibrium.

Detailed explanation-2: -A pattern in which species experience long, stable periods interrupted by brief periods of rapid evolutionary change is called punctuated equilibrium.

Detailed explanation-3: -As described by its proponents, punctuated equilibrium theory depicts organizations as evolving through relatively long periods of stability (equilibrium periods) in their basic patterns of activity that are punctuated by relatively short bursts of fundamental change (revolutionary periods).

Detailed explanation-4: -However, punctuated equilibrium is any sudden, rapid change in a species and can also be the result of other causes, such as huge and sudden changes in the environment that result in more rapid changes in the organisms through harsher selection.

Detailed explanation-5: -Punctuated equilibrium is a theory that states that evolution occurs primarily through short bursts of intense speciation, followed by lengthy periods of stasis or equilibrium. The model postulates that nearly 99% of a species’ time on earth is spent in stasis, and change happens very quickly.