For Natural Selection to Act on a Population, There Must

question 66

Multiple Choice

For natural selection to act on a population, there must be

• A) variation among members of the population.
• B) more offspring born than the environment can support.
• C) some members of the population that have greater reproductive success.
• D) variation that is heritable.
• E) All of the answer choices describe requirements for natural selection.

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Definitions:

Cannon-Bard Theory

The Cannon-Bard theory is a psychological model proposing that emotional feelings and physiological reactions to stimuli occur simultaneously and independently.

Arousal Theory

Arousal theory suggests that there is an optimal level of arousal necessary for the best performance of any task; too little or too much arousal can decrease performance efficiency.

Body Response

Physical reactions or changes in the body as a response to stimuli or conditions.

Brain Circuit

A set of neurons and their connections that work together to carry out a specific function or process in the brain.