Adaptation is one of the central concepts in evolutionary theory, which nonetheless has been given different definitions. Some scholars support a historical definition of adaptation, considering it as a trait that is the outcome of natural selection, whereas others support an ahistorical definition, considering it as a trait that contributes to…

Part of the Anthropology Curriculum Project, the document contains a programmed text on evolution and a vocabulary pronunciation guide. The unit is intended for use by students in social studies and science courses in the 5th, 6th, and 7th grades. The bulk of the document, the programmed text, is organized in a question answer format. Students are…