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Classification and Scientific Nomenclature

Classification and Scientific Nomenclature. ORDERING THE LIVING WORLD. What is classification?. Classification is the grouping of things according to characteristics The science of classifying organisms is known as taxonomy. Why do Scientists Classify?.

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Classification and Scientific Nomenclature

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  1. Classification and Scientific Nomenclature ORDERING THE LIVING WORLD

  2. What is classification? • Classification is the grouping of things according to characteristics • The science of classifying organisms is known as taxonomy

  3. Why do Scientists Classify? Almost 2 million kinds of organisms on Earth Need to keep organized! (Easier to study!) Classification = process of grouping things based on their similarities

  4. Early classification systems • Aristotle grouped animals according to the way they moved

  5. Aristotle’s System • Aristotle grouped animals according to the way they moved • For example, all animals that traveled by air were thought to have been related. • That meant that birds, bees, and bats were classified together and thought to be related!

  6. Aristotle’s System • As time passed, more species were discovered & some did not fit easily into Aristotle’s system of classification. • Therefore, it became a great need for his system to be replaced! • Organisms are now classified according to their EVOLUTIONARY RELATIONSHIPS (HOW THEY HAVE CHANGED OVER TIME) • = phylogenetics

  7. Linnaeus’s System • Carolus Linnaeus, a Swedish Botanist developed a wonderful method of classifying organisms properly. • His system was based upon classifying organisms according to organism's physical and structural similarities. • For example, he might use the similarities in flower parts as a basis for classifying flowering plants.

  8. Eight classification groups of living things • (Domain) • Kingdom • Phylum • Class • Order • Family • Genus • Species King Phillip Came Over For Grape Soda

  9. Kingdom • 6 main kingdoms: (large groupings of living things) • Eubacteria • Archaebacteria • Protista • Fungi • Plantae • Animalia

  10. Phylum • Phylum: is a Taxa or “group” of similar classes. • The kingdom Animalia contains approximately 35 phyla (or divisions) http://en.wikipedia.org/wiki/Phylum#Animal_phyla

  11. Porifera Ctenophora Cnidaria Nematoda Platyhelminthes

  12. Chordata Arthropoda Annelida Molluska Echinodermata

  13. Class • Class: A class is a group of similar “Orders.”

  14. Order • Order: is a taxon or “group” of similar families.

  15. Family • Family: is a group of similar genera.

  16. Genus • A genus is a group of similar species.

  17. Species • Species is a group of organisms in a population that can interbreed and produce fertile offspring. • E.g. grizzly bears are • Ursushorribilis

  18. Binomial Nomenclature • Developed by Linnaeus • Two-name system • Each organism has a genus and a species name • A genus (plural form = genera) consists of a group of similar species. FIRST NAME • A species, the SECOND NAME, the descriptive word, • Ursushorribilisor Ursushorribilis

  19. Grizzly Bear • Genus- always capitalize first letter • Species- always lowercase first letter • Underlined or italics • Ursusmeans__BEAR________ (genus) while the species name is the descriptive word. Horribilis means __HORRIBLE YEAR________ which describes this type of bear, therefore called UrsushorribilisorUrsushorribilis

  20. Two Names For A Species • Latin is the language of scientific names which is still used today because the language is no longer used in society for conversation. Therefore, it does not change. • many organisms have common names just like you & your friends might have nicknames. • Useful so everyone understands what all other people are talking about- like metrics and measurement.

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