1. Taxonomy: The Science of Classifying  How many organisms are there??!! How many organisms are there??!!  Groups similar organisms together  Assigns each a name

2. Naming Organisms Organisms have common & scientific name All organisms have only 1 scientific name (usually Latin or Greek)….many common names Scientific name….2 names…..Developed by Carolus Linnaeus This two word naming system is called….

3. Binomial Nomenclature Written in italics (or underlined) 1st word is Capitalized --Genus 2nd word is lowercase ---Species Examples: Felis concolor, Ursus arctos, Homo sapiens, Panthera leo, Panthera tigris

4. Linneaus - devised the current system of classification, which uses the following schema Kingdom –Phylum Class –Order »Family »++Genus »++==Species

5. As you move towards species…organisms become more specific!!! Larger number of organisms in higher taxa!!!

9. HumanCougarTigerPintail Duck K Animalia P Chordata C Mammalia Aves O PrimateCarnivora Anseriformes F HomindaeFelidae Anatidae G HomoFelisPantheraAnas S sapiensconcolortigrisacuta

13. HumanCougarTigerPintail Duck K Animalia P Chordata C Mammalia Aves O PrimateCarnivora Anseriformes F HomindaeFelidae Anatidae G HomoFelisPantheraAnas S sapiensconcolortigrisacuta

18. Modern Evolutionary Classification Linnaeus grouped species mainly on visible similarities &differences Today, taxonomists group organisms into categories that represent lines of evolutionary descent(phylogeny) Evolutionary relationships among a group of organisms can be shown on a cladogram

22. Using Dichotomous Keys A dichotomous key is a written set of choices that leads to the name of an organism. Person identifying provided with two (2) choices at each stage When a decision made  2 more choices…..until the creature is identified