Choose the True Statements About Molecular Clocks

question 21

Multiple Choice

Choose the true statements about molecular clocks.

• A)All molecular clocks tick at the same rate.
• B)Molecular clocks can be calibrated using fossil evidence.
• C)The rate of a molecular clock for a given DNA character might vary depending on how constrained the character is by natural selection.
• D)Ultimately,all molecular clocks depend on the rate of DNA mutation and DNA repair mechanisms.

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Definitions:

Nonsmokers

Individuals who do not smoke cigarettes and are not exposed to the habit of inhaling smoke from combustible tobacco products.

Positive Reinforcer

A stimulus which, when presented after a behavior, increases the likelihood of that behavior being repeated.

Noxious Stimulus

An unpleasant or harmful stimulus that can cause pain or discomfort to an organism.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without any prior learning or conditioning.