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Section 7-4

Section 7-4. Classification of Living Things. Why Classify?. Classification makes living things easier to study Scientists classify living things by physical characteristics (homologous structures) Taxonomy is the study of classification

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Section 7-4

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  1. Section 7-4 Classification of Living Things

  2. Why Classify? • Classification makes living things easier to study • Scientists classify living things by physical characteristics (homologous structures) • Taxonomy is the study of classification • Dichotomous Keys (taxonomic keys) – are used to classify organisms

  3. 7-5 Branching Trees • Branching trees show evolutionary relationships among organisms • Called “Shared Derived Characteristics” • Based on homologous structures

  4. Naming System Of Linnaeus • Binomial Nomenclature • Each organism is given a two part Latin name (Genus and species) • Based on eight levels of classification • Domain – Eukarya (cell with a nucleus) • Kingdom – Animalia (multicellular heterotroph) • Phylum – Chordata (spinal chord) • Class – Mammalia (hair, feed young milk) • Order – Primate (five fingers) • Family – Hominidae (large brain) • Genus – Homo (same / alike) • Species – sapien (thinker / philosopher)

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