When the Number of Breeding Animals Within a Species on an Island

question 21

Multiple Choice

When the number of breeding animals within a species on an island is small, evolutionary change may be rapid through .

• A) favorable adaptations
• B) natural selection
• C) unfavorable mutations
• D) physical isolation

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Definitions:

Negative Reinforcer

A stimulus whose removal or avoidance after a response strengthens that response or makes it more likely to happen again.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with an unconditioned stimulus, evokes a conditioned response in classical conditioning.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a reflexive response without any prior learning.

Reinforcer

A stimulus that increases the probability of a preceded behavior being repeated.