There is no universal molecular clock for invertebrates, but rate variation does not scale with body size
The existence of a universal molecular clock has been called into question by observations that substitution rates vary widely between lineages. However, increasing empirical evidence for the systematic effects of different life history traits on the rate of molecular evolution has raised hopes that rate variation may be predictable, potentially allowing the "correction" of the molecular clock. One such example is the body size trend observed in vertebrates; smaller species tend to have faster...[Show more]
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