Classification of Living Things. Why Classify? Scientific Names are dependable and universally accepted! Felis concolor – mountain lion, puma, panther,

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Presentation transcript:

Classification of Living Things

Why Classify? Scientific Names are dependable and universally accepted! Felis concolor – mountain lion, puma, panther, cougar panther, cougar

Carolus Linnaeus – Our system is based on his work. Heirarchical system – 7 levels. 7 levels.

Seven Levels of Classification

Naming Organisms Genus species Called Binomial Nomenclature! Examples: Homo sapiens – Human Human Bubo Virginianus – Great Horned Owl Great Horned Owl

Changes Over Time [edit]edit Linnaeus (1735) – 2 kingdoms – Animal and Vegetable Haeckel (1866) – 3 kingdoms – Protists, Plants, and Animals Chatton (1937) – 2 empires – Prokaryotes and Eukaryotes Copeland (1956) – 4 kingdoms – Monerans, Protists, Plants and Animals Whittaker (1969) – 5 kingdoms – Monerans, Protists, Fungi, Plants and Animals Woese, et. al. (1977) – 6 kingdoms – Eubacteria, Archaebacteria, Protists, Fungi, Plants and Animals Woese, et. al. (1990) – 3 domains – Bacteria, Archaea, Eukarya

Complete classsification

What characteristics are used? Similar structures Evolutionary relationships “Derived characters” – new characteristics that are evolutionary innovations Derived characteristics are used in cladograms.

Cladogram

Comparative Anatomy Turtle Human Horse Bird Bat Seal

Human Coccyx and Monkey Tail

Molecular Biology

Comparative Embryology CHICKHUMAN