Mutation Rates Are Similar in Bacteria and Archaea, Yet Certain

question 20

Multiple Choice

Mutation rates are similar in Bacteria and Archaea, yet certain stressful conditions mutation rates increase. Why is the mutation rate not constant and close to zero all of the time?

• A) Increased mutation rates can be advantageous in rapidly changing environments because some random mutations may be useful for survival.
• B) Microorganisms carefully control the mutation rate of their DNA to match the environmental conditions and maximize evolution.
• C) The increased mutation rate under stressful conditions is an indication that the microorganisms can no longer replicate their DNA properly and are about to die.
• D) Constant mutation rates would halt evolution completely.

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Definitions:

Civil Aeronautics Board

The Civil Aeronautics Board was a federal agency in the United States that regulated aviation services, including fares, routes, and schedules, before its dissolution in 1985.

Fares

The prices charged for transportation services, such as bus, train, or airplane tickets.

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Paths or directions followed for the transportation of goods or services from one location to another.

Clayton Act

A U.S. antitrust law enacted in 1914, aimed at promoting fair competition and preventing monopolies by prohibiting certain types of anti-competitive practices.