Answer:
punctuated equilibrium
Step-by-step explanation:
The punctuated equilibrium can be explained or described as a situation of evolutionary pattern, that is ,based on patterns of first appearances and subsequent histories of species in the fossil record.
For example, when there is a change in the habitat of an organism , the organism tends to develop an adaptation to it, which in the process, results to the development of adaptation structure. And this eventually means a difference in the evolutionary pattern of the organism.