If Many Living and Fossil Species of Camelids,a Mammal Family

question 36

Short Answer

If many living and fossil species of camelids,a mammal family containing camels,lamas,and alpacas,can be found in the Americas,but only two can be found in Asia and one can be found in Africa,camelids probably evolved in ________.

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Definitions:

Dorsal Thalamic Nucleus

Regions within the dorsal part of the thalamus in the brain, involved in sensory perception and regulation of motor functions.

Conditioned Response

A learned response to a previously neutral stimulus that has been repeatedly presented along with an unconditioned stimulus.

UCS

An abbreviation for "Unconditioned Stimulus," which in classical conditioning is a stimulus that naturally and automatically triggers a response without any prior learning.

CS

An abbreviation for Conditioned Stimulus, an initially neutral stimulus that, after being paired with an unconditioned stimulus, triggers a conditioned response.