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Classification and Taxonomy
Transcript of Classification and Taxonomy
and Taxonomy Why bother to classify organisms? To study the diversity of life Taxonomy is the discipline of classification. What are scientific names? How are they formatted? Common names are confusing Puma
Cougar How do we get rid of the confusion? A standardized system using Latin was developed. Developed by a Swedish botanist, Carolus Linnaeus. It was a two name system called binomial nomenclature. Genus is the first part of the name. Species is the second part of the name Examples of scientific naming Now that we know how to name, how do we group organisms? Taxon-a group or level of organization In Linnaeus's system there are seven levels.
Species Example: Eastern Gray Squirrel Problems with classification. Many organisms have similar structures Darwin caused a shift in classification, due to common descent Evolutionary classification was born Cladograms are a visual representation
of evolutionary classification Derived characteristics are used to make relationships More modern classification uses DNA and RNA Molecular clocks are used to determine how long ago organisms branched off on the tree of life The three Domain System Bacteria-unicellular prokaryotes Archaea-unicellular prokaryotes living in extreme conditions Eukarya-cells with nucleus
Animalia Six Kingdom System