Present knowledge about Mars is compared with past beliefs about the planet. Biological experiments that indicate life may exist on Mars are interpreted. Life patterns or biological features that might be postulated for extraterrestrial life are presented at the molecular, cellular, organism, and ecosystem levels. (DS)

Describes experiments suitable for introducing use of radioisotopes in biology. Includes demonstrations of tracing food chains, uptake of ions by plants, concentration of elements by insects, tracing photosynthetic reactions, activation analysis of copper, and somatic and genetic effects. Uses autoradiographic and counting techniques. (AL)

Discusses the experimental procedures and equipment for exobiology projects at the high school level. An interdisciplinary approach involving electronic equipment and micro-biological laboratory techniques is used. Photographs and diagrams of equipment are included. Bibliography. (LC)

Mid-nineteenth century work by Mendel on plant hybrids and by Pasteur on fermentation gave birth by way of bacterial genetics to modern-day molecular biology. The bacterium Escherichia Coli has occupied a key position in genetic studies leading from early gene identification with DNA to current genetic engineering using recombinant DNA technology.…

The author offers laboratory procedures for experiments using the bacterium, Agrobacterium tumefaciens, which causes crown gall disease in a large number of plants. Three different approaches to growing a culture are given. (SA)

Describes the collection and culturing of microscopic molds that feed mainly on tiny nematodes in the soil. Includes bibliography. (MA)

Describes methods for converting a large refrigerator or freezer into a microbiological incubator, in which a heater and temperature regulator are installed. (CS)

Discussed is the recycling of agricultural residues, either through fermentation or bioconversion processes, to help meet the energy requirements of the developing countries. (BT)

Turbidity problems which originate in water treatment plants and the use of control turbidimeters to reduce health hazards from water-borne diseases are considered. (CS)

Discussed is the currently known information relating to naturally occurring cancer-causing substances. Examples include: moldy grains, false morsel, coltsfoot, senecio plants, and bracken fern. (CS)

Describes the use of student-made photomicrographs as a source of student motivation and as a means for review of laboratory exercises in an introductory microbiology course. Includes an evaluation of this teaching method. (Author/MA)

Describes a microbiology laboratory experiment in which students test their own microbial flora of Staphylococcus for antibiotic resistance. Provides directions on how to conduct the experiment. (YDS)

Examined 10 introductory college-level, general biology survey textbooks for the coverage of algae to assess the efficacy of coverage. Describes a proposal of seven kingdoms and discusses the disposition of algae among five of these kingdoms. Contends that textbooks should highlight the concept of algae across the five kingdoms. Contains 59…