Which of the Following Statements About the Use of Molecular

question 53

Multiple Choice

Which of the following statements about the use of molecular clocks in phylogenetic analyses is true?

• A) A given gene usually evolves at the same rate in two different species regardless of differences in generation time of the species.
• B) Because changes in DNA sequences occur very slowly, molecular clocks can be used only to date evolutionary divergences that occurred millions of years ago.
• C) Molecular clocks must be calibrated with independent data, such as the fossil record.
• D) Even in a group of closely related species, different genes have been found to evolve at different rates.
• E) Both c and d

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Definitions:

Reversible Pattern

A visual or conceptual pattern that can be perceived in more than one way, often creating an optical illusion or a shift in perspective.

Blue

A primary color in the visible spectrum, perceived when light has a dominant wavelength of roughly 450-495 nanometers.

Circumstances

Circumstances are the conditions or facts affecting a particular event or situation.

Stimuli

Environmental signals or events that provoke responses from organisms, essentially the plural form of stimulus.