Which of the Following Correctly Describes the External Benefit Resulting

question 133

Multiple Choice

Which of the following correctly describes the external benefit resulting from an individual's purchase of a winter flu shot?

• A) The flu shot is cheaper than the cost of treatment when you get the flu.
• B) The income of doctors increases when you get the flu shot.
• C) The flu shot reduces the likelihood others will catch the flu.
• D) The flu shot reduces the likelihood you will miss work as the result of sickness; therefore, you will earn more income.

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Definitions:

Postzygotic

Referring to events that occur after the formation of a zygote, affecting hybrid viability or fertility.

Phyletic Gradualism

Phyletic gradualism is an evolutionary model proposing that species evolve through gradual changes of traits over long periods of time.

Punctuated Equilibrium

A theory in evolutionary biology that suggests species evolve rapidly during short periods of time followed by long periods of stasis.

Speciation

Speciation is the evolutionary process by which populations evolve to become distinct species, typically by being geographically isolated from one another and experiencing different environmental pressures.