classification of living things
DESCRIPTION
Classification of Living Things. Why Classify?. Scientific Names are dependable and universally accepted ! Felis concolor – mountain lion, puma, panther, cougar. Carolus Linnaeus – 1707-1778. Our system is based on his work. Heirarchical system – 7 levels. - PowerPoint PPT PresentationTRANSCRIPT
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Classification of Living Things
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Why Classify?Scientific Names are dependable and
universally accepted!
Felis concolor – mountain lion, puma, panther, cougar
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Carolus Linnaeus – 1707-1778
Our system is based on his work.
Heirarchical system – 7 levels.
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Seven Levels of Classification
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Naming OrganismsGenus speciesCalled Binomial Nomenclature!Examples:Homo sapiens – Human Bubo Virginianus – Great Horned Owl
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Changes Over TimeLinnaeus (1735) – 2 kingdoms – Animal and VegetableHaeckel (1866) – 3 kingdoms – Protists, Plants, and AnimalsChatton (1937) – 2 empires – Prokaryotes and EukaryotesCopeland (1956) – 4 kingdoms – Monerans, Protists, Plants and AnimalsWhittaker (1969) – 5 kingdoms – Monerans, Protists, Fungi, Plants and AnimalsWoese, et. al. (1977) – 6 kingdoms – Eubacteria, Archaebacteria, Protists, Fungi, Plants and AnimalsWoese, et. al. (1990) – 3 domains – Bacteria, Archaea, Eukarya
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Complete classsification
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What characteristics are used?
Similar structuresEvolutionary relationships“Derived characters” – new
characteristics that are evolutionary innovations
Derived characteristics are used in cladograms.
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Cladogram
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Comparative Anatomy
Turtle Human Horse Bird Bat Seal
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Human Coccyx and Monkey Tail
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Molecular Biology
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Comparative Embryology
CHICK HUMAN
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