1 / 11

Chapter 17: The History and Diversity of Life

Chapter 17: The History and Diversity of Life. Section 17-2: Finding Order in Diversity. Why do we classify?. A classification system identifies objects and gathers them into groups whose members are similar to each other

dsamson
Download Presentation

Chapter 17: The History and Diversity of Life

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 17: The History and Diversity of Life Section 17-2: Finding Order in Diversity

  2. Why do we classify? • A classification system identifies objects and gathers them into groups whose members are similar to each other • Biological classification systems based on a logical method of naming things; group organisms based on common features

  3. Biological Classification • Biologists had to create a universal set of rules for naming organisms, allowing each species to have a universally accepted name • The science of naming organisms and assigning them to groups is called taxonomy. (taxon = name group)

  4. Biological Classification • Carolus Linnaeus (Swedish botanist) developed the system of binomial nomenclature with which we identify species • Binomial = two word • Nomenclature = naming system

  5. Biological Classification • Each species is named used two Latin words called the GENUS and SPECIES to identify it • A genus is defined as a group of related species (plural is genera) • Hopefully you all remember the definition of species!

  6. Biological Classification: Example • Common house cat scientifically named Felis domesticus • Felis = genus and domesticus = species • Always in italics, genus capitalized • When written, should be underlined

  7. Further Classification • A family = group of related genera. • An order = group of related families. • A class = group of related orders. • A phylum = group of related classes. (In plants, division is used instead of phylum.) • A kingdom is a group of related phyla.

  8. Further Classification • Looking at the house cat again: Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Felidae Genus: Felis Species: domesticus

  9. Classification • How can you remember the seven taxa? • Use a pneumonic!

  10. The Kingdoms of Life • Modern classification shows common descent and evolutionary relationship • By analyzing genetic, biochemical, and physical similarities, scientists have agreed on six kingdoms

  11. The Kingdoms of Life • Eubacteria • Archaebacteria • Protista • Fungi • Plantae • Animalia

More Related