Examples include the well documented cases of the molluscan and bryozoan species. The majority of evolution cannot be accounted for by gradual development. 90 percent of cases can only be accounted for by punctuated equilibrium. Mollusks and trilobites. Unstable environments account for rapid genetic change, whereas stable environments allow for the possibility of gradual change.
Tests show that punctuated equilibrium is predominant.
This article obviously favors punctuated equilibrium. Unfortunately, it does not offer alternative explanations for evolution or provide ample evidence to support the argument. In James B. Miller, ed., An Evolving Dialogue Abstracted by Andrew Brewster, Rich Kopec, Tom Hargett, Dan Piet Darwin s ideas have been expanded on to form first Neo-Darwinism and then the synthetic theory as new techniques and branches in biology have come into being. Genetics, molecular biology, radiocarbon dating, and the like all provide more detailed explanations than Darwin s abstract theory about individual differences. Two current theories propose slightly different models as to how evolutionary change occurs.