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20 May, 09:09

Nucleotide substitutions occur by mistake in a segment of ribosomal RNA at a constant rate of one substitution every 10,000 years. A biologist has compared the ribosomal RNA of two modern-day species and found that they have six differences in their sequences. How many years ago did these species diverge from a common ancestor?

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  1. 20 May, 11:52
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    60,000 years ago the species diverged.
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