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ClassificationClassification Modified By Ms. Hundley

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The science of classifying organisms is called taxonomy The father of modern taxonomy was Carolus Linnaeus (Carl von Linn) Organisms are grouped into taxa based on their similarities to each other 1707-1778

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Old System 5 Kingdom Classification System: Monera: all prokaryotes Protista: single-celled eukaryotes (protists) Fungi: multi-cellular heterotrophic sessile eukaryotes Plantae: multi-cellular autotrophic sessile eukaryotes Animalia: multi-cellular heterotrophic motile eukaryotes

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6 Kingdom Proposal Archebacter ia Eubacteria

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New Classification Organisms are grouped into smaller and smaller groups all the way down to their species A species is the most specific grouping and includes only organisms that can interbreed with each other and produce fertile offspring

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Ursus americanus American Black Bear

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Often Latin names contain clues about the type of organism being described. Canis domesticus And closely related organisms are often in the same genus, also giving clues about their names Canis lupus Some names are given after the discoverer, or the discovery location, or even a Latinized descriptive term in English

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Domain Archaea

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Domain Eubacteria

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Domain Eukarya

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Kingdom Protista Amoeba ParameciumGiardia Water MoldSlime Mold Euglena Dinoflagellates Diatom Brown AlgaeGreen Algae

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Kingdom Fungi

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Kingdom Plantae Bryophyte (Moss) Pteridophyte (Fern) Coniferophytes (Pine Trees) Angiosperm; Dicot Angiosperm; Monocot

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Human Classification

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Domain: Eukarya Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Primates Family: Hominidae Genus: Homo Species: Sapien

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Dichotomous Keys 1a. Organism has 4 legsGo to # 2 1b. Organism has more than 4 legsGo to # 20 2a. Organism has a tailGo to # 3 2b. Organism has no tailGo to # 35 3a. Organism has stripesBengal Tiger 3b. Organism has no stripesAfrican Lion

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Dichotomous Key Try this one: 1a. Organism walks on all 4 legs (quadruped)2 1b. Organism walks on 2 legs (biped)8 2a. Organism has visible fur3 2b. Organism has no visible fur20 3a. Organism lives in warm climates7 3b. Organism lives in cold climates4 4a. Organism has brown or black furUrsus americanus 4b. Organism has white furUrsus maritimus