The molecular evidence of how the cytochrome c gene changes with time suggests that this gene evolves:

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The molecular evidence suggests that the cytochrome c gene evolves at a constant rate, meaning it changes at a steady and predictable pace over time. This is supported by the fact that the amino acid sequences of cytochrome c in different species differ by a fairly consistent amount, indicating a steady accumulation of mutations over time.

The Molecular Evidence of How the Cytochrome C Gene Changes