Which Statement About Molecular Evolution Is True

question 50

Multiple Choice

Which statement about molecular evolution is true?

• A) Almost all genes evolve at the same rate.
• B) All nucleotide substitutions give rise to amino acid replacements.
• C) Changes in the amino acid sequence of a protein can change its charge but not its secondary structure.
• D) Molecular evolution generates biological diversity.
• E) Molecular evolution does not account for genetic variation.

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Definitions:

Variable Ratio

In operant conditioning, a reinforcement schedule that rewards an action after an unpredictable number of responses.

Variable Interval

A schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, leading to responses at varying rates.

Avoidance Training

Avoidance training is a learning process in which an individual learns to prevent the occurrence of an unpleasant or harmful stimulus by performing a specific behavior.

Classical Conditioning

A behavior acquisition technique involving continuous pairing of two stimuli; a reaction initially triggered by the second stimulus becomes triggered by the first stimulus alone over time.