Introduces a laboratory experiment that isolates a bacterial polypeptide sample and measures the concentration of polypeptides in the sample. Uses Escherichia coli strain MM294 and performs a bio-rad assay to determine the concentration of polypeptides. (YDS)

Explains how to apply India ink to observe phagocytosis and vacuole formation in Tetrahymena. Recommends this experiment for introducing students to microscope use. (YDS)

Discusses procedures for investigating animal motion and makes suggestions for conducting a field or laboratory experiment using video. Recommends using nature videos to perform motion analysis. (YDS)

Discusses the common misconception persistent in high school and college level introductory biology texts that "dark reactions" of the Calvin cycle actually occur in the dark. Explains that they are indirectly dependent on the presence of light for their activity. (ASK)

Describes possible uses of computers and the internet for biology teachers to use as a supplemental instructional and research tool. Lists and defines commonly used Internet and computer terms. (Contains 26 internet references.) (ASK)

Presents a study reviewing the importance of spatial ability to biology achievement and demonstrates a spatial enhancement that presents content while improving an important aspect of spatial ability, flexibility of closure. (Contains 31 references.) (ASK)

Offers a new perspective on traditional problems in genetics on kernel color in corn, including information about genetic regulation, metabolic pathways, and evolution of genes. (Contains 15 references.) (ASK)

Presents an inquiry activity with a learning cycle approach to engage students in testing their own hypotheses about how molecules move through cell membranes. Offers student materials and teacher materials, including teaching tips for each phase of the learning cycle. (Contains 11 references.) (ASK)

Presents an activity that teaches macroscopic bone anatomy, muscle anatomy, and the creation of movement through model building that encourages cooperative learning and inquiry. (ASK)

Discusses the biodiversity crisis. Presents a simple invention to examine and photograph fish. (ASK)

Presents an activity that uses chenille stems, colored yarn, plastic straws, and ingenuity to make a low-cost manipulative kit for modeling mitosis and meiosis. (ASK)

Reports the effects of Bacillus thuringiensis var. Kurstaki (BT), which is highly toxic, to a non-target lepidopteran, the Painted Lady butterfly. Indicates that BT kills some Painted Lady butterfly larvae at the lowest dilution tested after 48 hours. (ASK)

Presents a new cooperative group learning strategy that encourages students to work together so that they learn the importance of sharing and synthesizing information during biology activities. (ASK)

Presents an experiment using plants grown on the classroom window sill that allows students to gain valuable hands-on experience in the collection and analysis of empirical data. (ASK)

Describes a method for teaching advanced ecology to juniors and seniors at an independent high school. Uses questions as the primary organizational tool to organize the curriculum. Facilitates teaching science in a manner closer to how it is practiced by scientists and helps students understand and appreciate science itself. (SAH)