How do we know if two organisms are closely related to one another?

How do we know if two organisms are closely related to one another?

-Hard to use visual comparisons, our ability to correctly guess relatedness using macroscopic observations is poor.

-Best to use [molecular comparisons]

-The best molecules to compare and contrast between organisms would be ones that ALL living organisms have

-All living organisms use DNA as their genetic material and they ALL convert the information in their chromosomes to proteins (translation).

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