How Many Major Branches Are There on the Evolutionary Tree

question 40

Multiple Choice

How many major branches are there on the evolutionary tree of life?

• A)one
• B)two
• C)three
• D)six
• E)12

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Definitions:

Partial Reinforcement

A conditioning principle where a behavior is reinforced only some of the time, leading to a slower acquisition of behavior but greater resistance to extinction.

Shaping

The process of reinforcing successive approximations of a desired behavior to teach new behaviors.

Reinforces

In psychology, refers to consequences that increase the likelihood of the behavior that led to them being repeated in the future.

Variable-Interval

A schedule in operant conditioning where a response is rewarded after an unpredictable amount of time has passed.