Argues that ontogenetic and phylogenetic theories are related and that such a coupling can be established only in reference to a metatheory. The metatheory is construed in terms of a combination of logical coherence and requirements necessary for generalization as well as comprehensive, philosophical representations of living beings (e.g.,…

Discusses ontogeny and phylogeny in Piaget's work, differences between Piagetian (constructivist) and Darwinian (selectionist) approaches, and problems associated with transposing conceptual systems from one field to another. (RH)

Reports on a study designed to examine students' understanding of certain aspects of heat, pressure, and evolution. Results indicated that little change was apparent over the two-year period of the study, with most of the students in the 12 to 14 age range at the same conceptual level as the 14 to 16 year olds. (TW)

In this paper, I describe the action research I conducted in my third-grade science classrooms over the course of two years. In order to gain an understanding of my third-grade students' ideas about animal adaptations and how the teaching of a unit on crayfish influenced these ideas, I used clinical interviews, observations, and written…

Discussed are the results of a test administered to nonmajor biology students on the topic of natural selection. The description of student conceptions, effects of instruction, and the effects of a belief in evolution are included. (KR)

From respondents to a questionnaire sent to a random sample of 654 Texas biology teachers, the following conclusions were made: 86% agreed evolution should be taught, 47% agreed it was a central theme in biology, 8% indicated that it conflicted with the Bible, and 7% noted there were more useful alternative theories explaining the history of the…