"Nothing in biology makes sense except in the light of evolution." This was the title of an essay by geneticist Theodosius Dobzhansky writing in 1973. Many causes have been given for the increased Cesarean section rate in developed countries, but biologic evolution has not been one of them. The C-section rate will continue to rise, because the…

Tests of the predictivity of the biorhythm theory using 30 staff members of a psychiatry service and 50 patients of a college health center showed low correlations between the observed and predicted feeling states. Most were not statistically significant. (BB)

Contends that the natural science curriculum does not prepare biology students for understanding the process of evolution. Proposes improved teaching approaches related to geological time, the natural transition of earth environments, the variability and alteration of genetic makeup, and the biological potential of species as being necessary for…

Biology textbooks usually give examples of organisms that have become ideally adapted to their habitat as a result of evolution. This article illustrates some poorly adapted organisms. Imperfections serve to demonstrate the purely chance nature of evolution since either the beneficial changes have not happened or the modifications that have…

Described is a tilting cage used to record the activity of a mouse over a 24 hour period. The construction of the apparatus, methods used and data analysis are discussed. Follow-up class activities are suggested. (CW)

Reports on dietary substances which act against cancer-causing agents. Indicates that adapting a lifestyle which combines reduced fat intake with increased fiber-containing foods will reduce the risk of some common cancers. Provides teaching strategies and activities to help students analyze their lifestyles for a reduction in cancer risk. (RT)

Brief analyses of three recent examples of biological determinism: sex roles, overpopulation, and sociobiology, are presented in this article. Also a brief discussion of biological determinism and education is presented. (MR)

Data from questionnaires sent to every college and university in the United States ascertained that 26 percent of the 223 responding major institutions offered a bioethics course, most frequently presented by the biology department to medical students and taught most frequently by professors of ethics and philosophy background. Questionnaire and…

Presents a model for teaching the principles of evolution. The model presents three major factors that direct changes and affect an individual's fitness. Uses and adaptations of the model are suggested. (Author/SA)

Compares different views of the role of sexual reproduction concerning the survival and evolution of species. Discusses the benefits and disadvantages of thelytoky, one nontraditional method of reproduction. (CW)

Presents a method for teaching high school students about evolution at the genus level as well as at higher taxons. Activities for a laboratory project and laboratory techniques are described. (SA)