Examlex
How does vitamin A deficiency affect the eyes?
Thunderstorm
A weather phenomenon characterized by the presence of lightning, thunder, heavy rain, and sometimes hail.
Lightning
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between two clouds, or between a cloud and the ground.
Classical Conditioning
The process of learning by continuously combining two stimuli; a response that first originates from the second stimulus ultimately originates from the first stimulus exclusively.
Operant Behavior
Conduct that is governed or impacted by its outcomes, such as incentives or sanctions.
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