LIFE SCIENCE

Detailed explanation-1: -Darwin thought that evolution occurs gradually. This model of evolution is called gradualism. The fossil record better supports the model of punctuated equilibrium. In this model, long periods of little change are interrupted by bursts of rapid change.

Detailed explanation-2: -Darwinian gradualism suggests that differences between species are often matters of degree and not matters of kind.

Detailed explanation-3: -In modern biology, gradualism, or “phyletic gradualism, ‘’ refers primarily to a pattern of sustained, directional, and incremental evolutionary change over a long period during the history of a species.

Detailed explanation-4: -So, the correct answer is ‘Gradualism’.

Detailed explanation-5: -Darwin defined evolution as “descent with modification, ‘’ the idea that species change over time, give rise to new species, and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.