Describes Project Tektite 1, during which a team of four scientists spent 60 days approximately 15 meters beneath the surface of the sea. Describes the "habitat" in which the men lived, reports biological and geological research carried out, and concludes that this research method has many advantages and potentialities. (EB)

Laments the neglect of discussion of active transport of plant nutrients from soil to root in general biology textbooks. (AL)

Theoretical model suggests antigen-sensitive cells produce antibodies only when two antigenic determinants are recognized, and explains self-nonself discrimination by antibody system. Specific antigen-sensitive cells accumulate in absence of foreign antigens and co-operate to induce antibodies if antigen enter the body; but antigen-sensitive cells…

Applies mathematical models to the concepts of ecological dominance and ecological niche. Considers niche width, the addition of new species to a community, and the evolution of dominant and subordinate species within a community. Analyzes data from other studies to support the models. (EB)

Analysis of the writings of anti-evolutionists contemporary with Darwin reveals that there were many objections that had to be overcome and that the Darwinian revolution" does not conform to the simple model of a scientific revolution as outlined by T. S. Kuhn. (AL)

Discusses ethical and social issues arising from the possible application of biomedical technologies providing control over life and death, human potentialities, and human achievement. Argues that "because we lack wisdom, caution is our urgent need," and proposes that systems of international control and regulation are needed. (AL)

Reviews applications of information theory to biology, concluding that they have not proved very useful. Suggests modifications and extensions to increase the biological relevance of the theory, and speculates about applications in quantifying cell proliferation, chemical homeostasis and aging. (EB)

Research report on the severe ecological consequences of the defoliation program by American military forces in Vietnam. A significant fraction of mature trees in most forests are killed by single application of herbicides and almost completely killed by repeated sprayings. AAAS is urged to set up an international research program on the…