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Phylogenies (1 of 3) Tree-like not ladder-like Image caption: Evolution produces a pattern of relationships A B C D among lineages that is tree-like, not ladder-like. << Back to search results

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Phylogenies (2 of 3) Left to right Just because we tend to read phylogenies from left to right, there is no correlation with level of "advancement."

Phylogenies (3 of 3) Order doesn't matter For any speciation event on a phylogeny, the choice of which lineage goes to the right and which goes to the left is arbitrary. These phylogenies are equivalent.