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Overview: This lesson introduces students to the building of cladograms as evolutionary trees, showing how shared derived characters can be used to reveal degrees of relationship. Author/Source: ENSI Grade level: 9-12 Time: One class period. Concepts: Scientists use anatomical evidence to infer the relatedness of taxa. Classification is based on evolutionary relationships. Evolutionary trees (i.e., phylogenies or cladograms) are built from multiple lines of evidence. Teacher background: Classification/Phylogenetics Evidence for Evolution

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