Biology / Bio 0076 · Atom · ~20 seconds
Phylogenetic Tree
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A phylogenetic tree is a diagram showing the evolutionary relationships among species, with each internal branch point marking a common ancestor.
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A branch splitting into two lineages marks the point where an ancestral population diverged into two separate species.
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A tree's branch lengths, where shown, represent evolutionary distance or elapsed time — never a ranking of which species is more advanced.