Molecular clocks and the incompleteness of the fossil record

  title={Molecular clocks and the incompleteness of the fossil record},
  author={Mark S. Springer},
  journal={Journal of Molecular Evolution},
Molecular clocks can be evaluated by comparing absolute rates of evolution and by performing relative-rate tests. Typically, calculations of absolute rates are based on earliest observed occurrences in the fossil record. Relative-rate tests, on the other hand, merely require an unambiguous outgroup. A major disadvantage of relative-rate tests is their insensitivity to concomitant and equal rate changes in all lineages. Apparent differences in absolute rates, in turn, may be artifacts that are… CONTINUE READING
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