Examlex
A cat has been classically conditioned to purr when it hears the door open to the refrigerator where its food is kept.But the cat does not purr when it hears the sound of the pantry door opening,where none of its food is kept.The fact that the cat shows the conditioned response,purring,only for the sound associated with the conditioned stimulus is most likely a result of _______.
Amphibians
A class of cold-blooded vertebrates that live both in water and on land at different life stages, including frogs, toads, salamanders, and newts.
Homo Erectus
An extinct species of early human that lived throughout much of the Pleistocene geological epoch, known for their upright stance.
Australopithecus Robustus
is a species of early hominins that lived in Southern Africa approximately 1 to 2 million years ago, known for its robust physical traits.
Use Fire
The ability to control and manipulate fire, a significant technological and cultural development in human history.
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