If the Two Sister Species on the Phylogenetic Tree in the Figure

question 41

Essay

If the two sister species on the phylogenetic tree in the figure below differ from the other two species in a single character state (e.g., dark fur, whereas the other taxa have light fur), where would the evolutionary change(s) have occurred? Indicate change(s) by placing an arrow-or arrows-on the tree. Be sure to label the presumed ancestral state, and label the arrow(s) as a "loss" or "gain."

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Definitions:

Classical Conditioning

An educational process where two stimuli are consistently paired together, resulting in a response initially triggered by the second stimulus ultimately being triggered by just the first stimulus.

Advertising Techniques

Strategies and methods used by companies and marketers to promote and sell their products, services, or ideas to consumers.

Classical Conditioning

An educational technique involving the repeated pairing of two stimuli, where the reaction initially caused by the second stimulus is ultimately prompted by only the first stimulus.

Conditioned Response

A learned response to a previously neutral stimulus that has become associated with an unconditioned stimulus.