A process of perception, reasoning and development of expectations. A group of animals representing a single genetic pool produced at a single site under identical conditions of management. Term applied to examination and preparation of animals for research. Animals which genetically differ at one particular locus. A disease or disorder easily transmitted from individual to individual.
Deprivation frequently is used experimentally to induce a detectable drive.
The difference between pressures measured at two points or levels in a system. Usually applied to controlling trait or gene governing genetic patterns. An internal state causing increased activity, e.g., hunger drive. The early or developing stage of any organism, especially the developing product of fertilization of an egg. The diversity and intensity of environmental stimuli relevant to a given organism, age group, species, etc.