![]() ![]() Wiley, of the Museum of Natural History at the University of Kansas, contend that evolution is fueled more by the internal changes of an organism than by forces in the external environment. Brooks argued that the pepper moth only proves the adaptability of an organism to its environment, not how it becomes a new species.īrooks and collaborator Edward O. Once the environment was cleaned up, the pepper moth gradually became predominately white again. This predominantly white species of insect became mostly black as the effects of industrial pollution were seen in its native area. But detractors of neo-Darwinism argue that although tall trees may have provided a niche for longer-necked hooved animals in the African plain, that does not explain the greater variety of hooved animals such as antelope and deer, which have short necks, that forage in the same area.Īnother example, cited by Brooks, is the pepper moth. ![]() As refined and popularized in the 1940s by a group that became known as neo-Darwinists, Darwin’s theory of evolution begins with the assumption that evolution has taken place, then proceeds to examine the forces in the external environment that gave direction or order to what would otherwise have been random biological forces.Īccording to neo-Darwinists, a giraffe, for example, developed its long neck because it was best suited for the type of food to be had in its environment.
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