Describes gene infusion, the continual replacement of genes for insecticide susceptibility into insect populations, to control the level of resistant genes in pest populations. (AL)

Written in response to an earlier article questioning certain aspects of evolution theory. Discusses ontogeny and phylogeny, the basis of evolution, chance or purpose in evolution, micro and macro-evolution, reversibility, and the evolution processes today. (MA)

In this article a philosophy teacher looks at some of the questions raised by the concept of evolution and what biologists have said about them throughout the ages. (BB)

Illustrates an account of the University of Illinois Programmed Logic for Automatic Teaching Operations (PLATO) system of individualized instruction by describing four undergraduate topics. (AL)