Presents a method of observing mitotic divisions in broad bean root tips, using aceto-orcein dye and hydrochloric acid. (CS)

Describes an experiment using chromatographic techniques on aging leaves which gives high school biology students the opportunity to observe, question, and formulate hypotheses. (CS)

Describes the processes involved in clinical urinalysis and relates them to possible high school biology classroom uses. (CS)

Describes the use of personalized instruction in an introductory biology course for nonmajors at the University of Wisconsin-Superior. (CS)

Provides background information on the interdependency of agriculture and ecological and social systems. Discusses in detail: (1) fossil energy and food production; (2) energy-intensive agriculture and environmental pollution; and (3) methods for developing alternatives. Includes recommendations to conserve fossil energy used in current food…

Expresses viewpoints supporting moderation in current issues of the preservation of the natural environment. (CS)

Risk assessment (the identification of hazards, the determination of the probability of a hazardous event occurring, and an estimation of the severity of such an event's occurrence) is suggested as a technique to be used to analyze current issues in environmental education in an objective manner. (PEB)

Discusses the use of computers for nine different tasks in biological education: information retrieval, data accumulation, data analysis, simulation and systems analysis, decision making, experimental control, course review, computer-managed instruction, and word processing. (PEB)

The use of instant agar-free media in high school biology classes is discussed. The synthetic media are relatively inexpensive, heat stable, dependable, and time-saving. (Author/PEB)

The use of toluidine blue as a stain for plant tissues is advocated. Directions for hand-cut tissue staining are provided. (PEB)

A study conducted by high school advanced bacteriology students appears to confirm the hypothesis that the incremental administration of antibiotics on several species of bacteria (Escherichia coli, Staphylococcus epidermis, Bacillus sublitus, Bacillus megaterium) will allow for the development of antibiotic-resistant strains. (PEB)

Scientific challenges are presented to motivate secondary and college students in creative thinking and scientific problem solving. Student solutions to the "Create-a-Creature" challenge are presented and six new challenges are issued. (PEB)

Examined 227 articles appearing in science education periodicals (1962-1981) related to science and society education. Articles reviewed reached a peak in the early '70s and then declined. Four major areas of weaknesses in science and society education revealed by the data in the study are outlined. (JN)

Discusses several instructional strategies to meet objectives of a college level bioethics course. Includes an example of how a specific topic (death) is explored. Also includes examples of Personal Value Inventory, Five-Sort Value Inventory, and Bioethical Value-Clarifying Decision-Making model used by students in analyzing specific ethical…

Focusing on the centromere (kinetochore), discusses what term should be used to represent this cellular component. Also discusses centromere/kinetochore replication, structure of the kinetochore, and the nature of the binding material that holds until anaphase of mitosis and meiosis. (JN)