Skip over navigation

Contents

Macroevolution

Problems

Macroevolutionary Theories

A Brief History of Life

Problem : Describe the theory of Phyletic Gradualism

The theory of Phyletic Gradualism states that evolution takes place slowly and constantly through time.

Problem : Describe the theory of punctuated equilibrium.

The theory of punctuated holds that the change we can see is evolutionarily minor and that speciation occurs only in response to major crises or genetic events. The majority of time, species exist in relative stasis, changing very little, until a crisis or major genetic event occurs and they undergo rapid change.

Problem : What evidence to Eldredge and Gould point to for support of Punctuated Equilibrium.

Eldredge and Gould state that their theory is supported by the fossil record, which shows major evolutionary changes separated by periods of relative stability.

Problem : Which theory of macroevolution did Darwin support?

Darwin supported the theory of gradualism. He felt that evolutionary change was slow and constant.

Follow Us