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Classification of Living Things. Why Classify?. Scientific Names are dependable and universally accepted !. Carolus Linnaeus – 1707-1778. Our system is based on his work. Heirarchical system – 7 levels. Seven Levels of Classification. 1. Kingdom 2. Phylum 3. Class 4. Order
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Why Classify? Scientific Names are dependable and universally accepted!
Carolus Linnaeus – 1707-1778 Our system is based on his work. Heirarchical system – 7 levels.
Seven Levels of Classification 1. Kingdom 2. Phylum 3. Class 4. Order 5. Family 6. Genus 7. Species Most broad Most specific
Naming Organisms Genus species Called Binomial Nomenclature! Examples: Homo sapiens – Human
What characteristics are used? - Similar structures - Evolutionary relationships - “Derived characters” – new characteristics that are evolutionary innovations Derived characteristics are used in cladograms.
Comparative Anatomy Turtle Human Horse Bird Bat Seal
Comparative Embryology CHICK HUMAN
Dichotomous Keys • written set of choices that leads to the name of an organism • Used to indentify unknown organisms