Biology / Bio 2231 · Atom · ~20 seconds
Animal Phylogeny as Evidence-Based and Revisable
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The animal phylogenetic tree, per Bio 1787 and Bio 0076, is built from morphological, developmental, and molecular evidence together, and shifts as new evidence arrives.
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Molecular sequence data has repositioned several animal lineages relative to earlier trees built from body-plan comparisons alone.
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A textbook animal tree states the current best-supported hypothesis, not a discovered, unchanging fact about ancestry.