Describes a science experiment in which the heartbeats of mammals can be counted and graphed as measurable data by the computer. Provides information on materials needed, pre-lab activity worksheet, and follow-up activities. (RT)

Describes the contribution made to the quality of human life by the study of genetics. Presents a description of the current status of genetics education. Suggests changes in genetics education necessary to keep up with new developments. (39 references) (CW)

Glaring and basic textbook errors and misconceptions about photosynthesis are discussed. The Calvin Cycle, photosynthetic products, alternative cycles, and plants as producers are considered. Included are observations of both college and secondary textbooks. (CW)

Presented are the results of a survey of biology teachers. Results are compared to surveys of Ohio and Kentucky. Suggestions to improve the coverage of evolution are included. A copy of the survey questionnaire is appended. (CW)

Discussed is the value of using essays and other popular writings as supplemental material for advanced placement biology courses. Their value as motivators and as views of the everyday work of scientists is stressed. (CW)

Described is a tilting cage used to record the activity of a mouse over a 24 hour period. The construction of the apparatus, methods used and data analysis are discussed. Follow-up class activities are suggested. (CW)

Presented is an activity designed to connect Mendelian laws with the physical processes of cell division. Included are materials production, procedures and worksheets for the meiosis-mitosis game and a genetics game. (CW)

Described is a laboratory study designed to demonstrate loss of vegetation, alterations in the species composition of a community, and the impoverishment of a community with respect to desirable food plant species when herbivore feeding exceeds the rate of vegetation regrowth. The laboratory uses a classroom aquarium. (CW)

A field-based exercise which illustrates one aspect of how leaves in multilayered trees take advantage of light microenvironments is presented. Procedures, tree selection and data analysis are discussed. (CW)

Given is a rationale for using science demonstrations. The development and characteristics of successful demonstrations are presented. An illustration is given in the area of microbiology. A rating sheet is included. (CW)

Ordering principles, hierarchy, taxonomy, emergence, and decomposable systems are discussed. Examples of hierarchies are included. (CW)

Described is The McKusick Catalog of human genetics. This article discusses how biology instructors could make use of this reference and answers specific questions regarding its use. (CW)

Discussed is learning theory as it is related to the teaching of biology. This article proposes that extension of the original cycle model into three types of learning cycles can form the basis of a satisfactory and educationally practical model of instruction. Includes 30 references. (CW)

This article describes how pasteurized milk can act as a growth medium for bacteria and provide an ecosystem for scientific inquiry. Included are objectives, materials, procedures, questions and a discussion of expected results. (CW)

This article describes how to set up a receiving station for information from satellites. Included are discussions of the benefits of using such technology and ideas for their application in biology classrooms and instructions for assembling the equipment needed to receive satellite transmissions from space. (CW)