A statistical analysis of student questions in a cell biology laboratory.

Asking questions is an essential component of the practice of science, but question-asking skills are often underemphasized in science education. In this study, we examined questions written by students as they prepared for laboratory exercises in a senior-level cell biology class. Our goals were to discover 1) what types of questions students asked about laboratory activities, 2) whether the types or quality of questions changed over time, and 3) whether the quality of questions or degree of improvement was related to academic performance.

Controversial issues: euthanasia - a guide to resources.

The purpose of this resource guide is to provide health sciences, medical, and large libraries a description of the content and features of the most popular Web sites on euthanasia. The redundancy in results of searches of the term "euthanasia" in multiple search engines indicates the high likelihood that information seekers will be directed to one or more of these sites. The eight most frequently retrieved sites are discussed here with attention paid to position (i.

Adrenal hormones mediate melatonin-induced increases in aggression in male Siberian hamsters (Phodopus sungorus).

Among the suite of seasonal adaptations displayed by nontropical rodents, some species demonstrate increased territorial aggression in short compared with long day lengths despite basal levels of testosterone. The precise physiological mechanisms mediating seasonal changes in aggression, however, remain largely unknown. The goal of the present study was to examine the role of melatonin, as well as adrenal hormones, in the regulation of seasonal aggression in male Siberian hamsters (Phodopus sungorus).

Social interactions differentially affect reproductive and immune responses of Siberian hamsters.

Social interactions can have pronounced effects on reproductive physiology and behavior in a wide range of species. Much less is known about the effects of social interactions on immunity. The goal of the present study was to test the effects of social interactions on both reproductive and immune responses in Siberian hamsters (Phodopus sungorus).