Which of the Following Statements About Extinctions Is True

question 4

Multiple Choice

Which of the following statements about extinctions is true?

• A) The background extinction rate is that which occurs during a mass extinction.
• B) Extinctions are occurring now at rates comparable to those of the five mass extinctions.
• C) Most of the species that have ever existed are extinct.
• D) Both a and b
• E) Both b and c

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Definitions:

Probability

A calculation of the chance of a certain event taking place, denoted by a number between 0 and 1.

Cards

Paper or plastic rectangular pieces, often used for playing a variety of games, or as a medium for storing information such as identification or banking details.

Fair Die

A fair die is a dice designed to have equal likelihoods of landing on any of its faces when thrown.

Events

Occurrences or happenings, especially significant ones within a specified area or context.