Describes procedures for extracting nematodes from soil and culturing them for study and experimentation. (PB)

Suggests a supplementary activity, a radio talk show, for botany students. The show highlights the current undertakings of plant scientists. (LS)

Reviews basic concepts of predator-prey interaction, encourages the presentation of the predator's role and describes a model of predator behavior to be used in secondary school or college classes. (LS)

Describes an experiment demonstrating genetic transformation that opens up many areas of laboratory work and discussion with students. (LS)

Describes an exercise that teaches Mendelian inheritance using human traits which students find exciting and relevant. (LS)

Describes a bird-study and banding activity designed for students in urban and suburban areas. (PEB)

Describes in detail the laboratory procedure for studying the process of amitosis in the vegetative cells of Nitella axillaris. (BR)

Describes a simple method for extracting bacterial DNA for use in laboratory investigations to study genetic transformation in bacteria. (BR)

Describes laboratory exercises with chickens selecting their food from dyed and natural corn kernels as a method of demonstrating natural selection. The procedure is based on the fact that organisms that blend into their surroundings escape predation. (BR)

Describes how to use the distinctive properties of osazone formation in conjunction with molecular model construction to demonstrate the relationship between the three-dimensional structures of simple sugars and the shapes of crystals they form. (BR)

Exercises are presented for classification of marine algae on the basis of biochemical characteristics such as pigmentation, cell wall components, and food storage products. (BB)