Discusses some of the current theories on aging, such as biological time clocks for certain cells and on-off switches for genes, that were offered as explanations at the 140th annual meeting of the American Association for the Advancement of Science (JR)

Argues that the topic of symbiosis has been greatly neglected and underemphasized in general-biology textbooks. Discusses many types and examples of symbiosis, and provides an extensive bibliography of the literature related to this topic. (JR)

Research has progressed from three major directions--biological, chemical, and non-enzymatic. Hopefully all three will converge and will explain not only the process, but also introduce new means for modifying the molecule to meet the nutritional needs of man in areas now incapable of self support without fixed nitrogen. (DF)

Discusses the ethics involved in studying and experimenting with living organisms; suggests that present laws relating to the protection of animals may be in need of revision. (JR)

How pesticides, polychlorinated biphenyls, and heavy metals might get into poultry meat or eggs is reviewed. Several case studies where chemicals were found in poultry products are discussed. It can be concluded that the poultry industry is striving and generally succeeding in producing safe and nutritious meat and eggs. (Author/EB)

Offering a single degree, a Bachelor of Arts in Human Ecology, the College of the Atlantic (COA) has completed its maiden academic year on Maine's Mt. Desert Island. (Author)

Discusses research in the use of hormones and viruses to control insect populations. Although entomologists do not think that pheromones, hormones, and viruses will completely replace more conventional chemical insecticides, they will become increasingly important and will reduce our dependence on traditional insecticides. (JR)

Two investigations are reported regarding grasshoppers and their behavior. Procedures and data are included and materials for further work are available. (PS)

Origins, philosophy, goals, textbook formulation, guidelines, other publications, and measurement of success for the Biological Sciences Curriculum Study program are discussed. (DF)

Community Health and Environmental Surveillance System (CHESS), a nationwide program relating community health to environmental quality, is designed to evaluate existing environmental standards, obtain health intelligence for new standards, and document health benefits of air pollution control. (BL)

Traces the history of life on earth from the Cambrian period to present. Stresses the importance of inter-dependence of individual and species and the dependence of life upon non-life. Discusses the speed at which man has altered nature's balance and the question of how an ecological balance is to be maintained. (LK)