One of the key aspects of natural selection is competition, yet the concept of competition is not necessarily emphasized in explanations of natural selection. Because of this, we developed an activity for our class that focuses on competition and provides an example of the effects of competition on natural selection. This hands-on activity models…

Molecular similarity is one of the strongest lines of evidence for evolution--and one of the most difficult for students to grasp. That is because the underlying observations--that identical mutations are found in closely related species and the degree of similarity decreases with evolutionary distance--are not visible to the human eye. And it's…

Understanding homology is fundamental to learning about evolution. The present study shows an exercise that can be varied in complexity, for which students compile research illustrating the fate of homologous fish skull elements, and assemble a mural to serve as a learning aid. The skull of the most primitive living Actinopterygian (bony fish),…

Presented are ideas for the teaching of natural selection using materials related to living creatures instead of artificial models such as toothpicks. Some investigations using simple flowtanks to investigate the stability of Gryphaea shells and a simulated non-visual search for Cepaea are suggested. (Author/AJ)

Presented is a Learning Activity Package (LAP) study concerned with the concept of organic evolution. Contained in this LAP are the rationale for studying the concept, a list of objectives (stated in behavioral terms) for the student to accomplish, a list of reading references and audiovisual aids (filmstrips with cassette tapes, teaching tapes),…

Presents a simple activity that simulates natural selection working on random mutations through many generations. (PR)

Presents a simple model that can help students think about evolution and better understand the gradualist and punctuationist macroevolution approaches. The model also improves instruction for concepts of mutation, selection, fitness, extinction, and origin of life. Describes an IBM computer program for instruction in these areas. (PR)