Author provides details about Helmont's experiment that was a milestone in the history of plant biology since it marked the start of experimental plant physiology. Concludes that Jean Baptista van Helmont's supposedly simple experiment becomes complex when trying to determine the methods he used, evaluate his sources of experimental error, and…

Describes how paramecium can be identified through the use of DNA-binding fluorescent compounds. The authors used these techniques to test the paramecium stocks from 12 commercial sources. The details of the staining procedures and the results of the commercial tests are presented in this article. (PR)

The author presents a dichotomous key to 29 tree cones, fruits, and nuts of eastern United States. Students can use the key to identify at least 10 species in a 1-hour laboratory assignment. This key uses reproductive structures that are significantly different from others. These structures are durable enough to be used in the laboratory for many…

Describes an inexpensive and easy way to maintain a setup for raising crickets. (ZWH)

Describes a survey used to determine the availability of intact marine vertebrates and live invertebrates in supermarkets. Results shows that local supermarkets frequently provide a variety of intact marine organisms suitable for demonstrations, experiments, or dissections. (ZWH)

Provides insight on the concept, punctuated equilibrium, in the hope of enhancing evolution education. (ZWH)

Presents an activity that provides students an opportunity to explore the tempo and mode of evolution by analyzing data and constructing two evolutionary trees, one gradualistic and one punctuated. (ZWH)

Links between science and literature brought about by authors interested in nature are discussed. Examples of literature which incorporate ideas of science are described. The enrichment of a student's appreciation of biology by incorporating literature into the curriculum is emphasized. (23 references) (KR)

Describes a real life example of natural selection that can be used instead of computer simulation to teach evolution to students. (ZWH)

Provides examples that can be used to enhance students' understanding of the long-term impact which cellular events, such as mitosis, have on developmental commitment of cells within tissues. (ZWH)

Discusses the educational and therapeutic value of wild lands. Discusses preserving and developing urban wild lands. (PR)

Argues that the Woesian three domain view of life should replace the five kingdom taxonomic scheme presented in most general biology texts and courses. Presents evidence for employing the three domain scheme and a related activity for classroom use. Contains 11 references. (WRM)

The lack of understanding of the scientific method is more widespread than it is believed. Points out the misuse of terminology in science and students' and scientists' confusion on using the term "hypothesize". Discusses the differences between predictions and hypotheses. (Contains 12 references.) (YDS)

Presents an embryology laboratory observing the development of Ginkgo biloba's embryos into trees. Explains the methodology for the lab and discusses research questions. (YDS)

Discusses the teacher's role in helping students deal with homosexuality and suicide. Teachers can provide unbiased information about personal relevant biological issues; be good listeners and confidantes; and value each student without regard to race, gender, class, or sexual orientation. Provides useful information on addressing homosexuality in…