Examlex
Correctly match the definition with the correct geologic time period.
-flowering plants begin to dominate life on land; mass extinction at end of period,including extinction of the last dinosaurs; 65-145 mya
Drive
An intense internal force that motivates behavior.
Homeostasis
The tendency to maintain equilibrium by adjusting physiological or psychological processes.
Primary Drives
Basic, innate drives that motivate behavior essential for survival, such as hunger, thirst, and avoidance of pain.
Hull
An American psychologist who developed the drive-reduction theory, emphasizing the role of biological needs in motivation and behavior.
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