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17.1 Classification Think about how things are grouped in a store or in your kitchen to help create order. Classification Classification – the grouping of objects based on similarities Taxonomy – branch of biology that groups and names organisms based on characteristics Early Classification Aristotle, Greek philosopher 384-322 B.C. Plants Animals Early Classification Carolus Linnaeus, Swedish botanist 1707-1788 Based on structural similarities Binomial nomenclature – two word naming system in Latin Genus species Common name Homo sapiens humans Classification Today We still use the system Linnaeus used Taxonomic rankings Larger groups share traits Kingdom Phylum Class Order Family Genus species Keys to evolutionary relationships Similar structure Keys to evolutionary relationships Similar structure Breeding behavior Keys to evolutionary relationships Similar structure Breeding behavior Location Keys to evolutionary relationships Similar structure Breeding behavior Location Chromosome structure Keys to evolutionary relationships Similar structure Breeding behavior Location Chromosome structure Biochemistry