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In an experiment,an electric can opener is used to open a can,and no salivation by the subject is detected.After a number of pairings between the can opener's operation and food,any time the can opener is used,the subject salivates.The conditioned response in this study is the
Evolutionary Pressure
Forces or factors that influence the chances of survival and reproductive success of organisms, leading to natural selection and evolution.
Successful Pregnancy
A pregnancy that results in the birth of a living infant who is carried to full term without significant complications.
Replacement Level
The fertility rate at which a population exactly replaces itself from one generation to the next, without migration.
Fertility Rate
A demographic measure indicating the average number of children born to a woman over her lifetime within a specific population.
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