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a discipline that focuses on classifying organisms and their evolutionary relationships - fossils, morphology, genes, molecular evidence
an ordered division of organisms into categories based on a set of characteristics used to assess similarities & differences
general to inclusive - Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
systematists use branching diagrams to depict hypotheses about evolutionary relationships - reflect hierarchical classifications of groups nested within more inclusive groups
when 2 organisms developed similarities as that adapted to similar environmental changes
depicts patterns of shared characteristics among taxa & forms the basis of a phylogenetic tree
methods used to measure the absolute time of evolutionary change based on the observation that some genes & other regions of the genome appear to evolve at constant rates
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