Examlex
Describe Darwin's principle of natural selection.Give examples of structural and behavioral characteristics that might confer selective advantages to an organism.
Relaxation
The act or state of reducing tension or stress, often achieved through techniques such as meditation, deep breathing, or muscle relaxation exercises.
Fear Response
The automatic, immediate reaction to a threatening situation, often characterized by physiological changes like increased heart rate.
Unconditioned Stimulus
In classical conditioning, this is a stimulus that elicits a natural, reflexive response without the need for prior learning.
Classical Conditioning
A learning process that occurs when two stimuli are repeatedly paired: a response that is at first elicited by the second stimulus is eventually evoked by the first stimulus alone.
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