Which of the Following Statements About the Use of Molecular

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