Which of the following observations is consistent with the hypothesis that all life on Earth has a common ancestor?

Question

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The observation that different organisms use the same set of amino acids suggests that they have a common ancestor, as this indicates that they share a common genetic code. If different organisms had different sets of amino acids, it would suggest that they evolved independently and do not share a common ancestor. Choices C and D do not provide evidence for or against the hypothesis, and choice B contradicts it.

Which of the Following Observations Is Consistent with the Hypothesis