Argues that biology teaching at its best is characterized by students acquiring scientific, creative, and critical-reasoning skills. Advocates the use of case studies as an alternative approach to investigative laboratories. Contains 23 references. (DDR)

Presents an interview with biologist Stephen Jay Gould in which he discusses the state of biology education and the continuing debate over the evidence that supports the theory of evolution. (DDR)

Presents an exercise that describes the direct extraction and purification of DNA from a small soil sample. Also discusses the subsequent amplification of a 343-bp Tn7 transposate A gene fragment (tnsA) from a strain of Pseudomonas aureofaciens 3732RNL11. Contains 21 references. (DDR)

Presents some simple demonstrations that students can construct for themselves in class to learn the difference between diffusion and convection rates. Uses cabbage leaves and gelatin and focuses on diffusion in ungelified media, a quantitative diffusion estimate with hydroxyl ions, and a quantitative diffusion estimate with photons. (DDR)

Describes the effects of thigmomorphogenesis, the mechanical stimulation of plants, and how to engage biology students in a study of this unusual plant response. Focuses on an exploration of the effect of wind on a particular plant variety. (DDR)

Presents a protocol that can be used to discover that S. marcescens produces a bright red pigment when exposed to one temperature condition and does not produce this color under other conditions. Enables students to connect gene expression and environmental changes. (DDR)

Discusses practical work which can be completed in a few hours that enables students to explore the genetics of the dandelion plant, which reproduces asexually. Dandelions, measuring instruments, and student imagination are needed for this activity. (DDR)

Describes a set of manipulatives that are used to establish a secure understanding of the concepts related to the environmental factors that affect the activities of enzymes. Includes a description of the model components and procedures for construction of the model. (DDR)

Describes a biological research project that identifies and characterizes genes and gene products involved in the cell cycle using the fungus Aspergillus nidulans. (DDR)

Emphasizes the unique advantages of computer-mediated communication (CMC) for teaching genetics. CMC allows students to collect larger sample sizes than other methods and from any part of the world in a very short time. Describes hardware and software requirements, useful tools and techniques, and a sample project on human genetics for a…

Computer-based simulations of scientific phenomena provide learner-centered environments within which students can explore systems, manipulate variables, and test hypotheses. Explains how simulations fit into the big picture of instruction and offers recommendations for developing a written guide for students, determining student accountability,…

Presents overviews of two programs developed in the spirit of the National Science Education Standards. BSCS Biology: A Human Approach is an inquiry-based, activity-driven biology program developed by the Biological Science Curriculum Study (BSCS). Insights in Biology, developed by the Education Development Center (EDC), is a modular program that…

Biology students are exposed to historical theories of medicine by contrasting modern medicine and germ theory with the humoral theory of medicine in ancient Greece. After spending one day describing basic theories in humoral medicine, the teacher role-plays a Hippocratic physician treating ailing Greek patients in a Hippocratic medical workshop.…

Saccharomyces cerevisiae provides an excellent tool for students to enter into inquiry-based science. This very simple organism is used to demonstrate that the principles governing life apply to all organisms. Students learn to design experiments using trypan blue and heat, build upon their findings with new experiments, and refine and repeat…

Describes construction and use of a simple air-flow porometer for measuring how rapidly a certain quantity of air can be driven through a leaf by a known pressure difference. The device can be used to investigate how stomata respond to light, carbon dioxide, water status, and air pollutants. (PVD)