Classification

• Classes of organisms as determined by Carl Linnaeus

  Kingdom, phylum, class, order, family, genus, species
• Features living creatures are traditionally classified by

  • Structure and characteristics
• Binomial system of naming organisms

  Genus name followed by species name
• Reasons new classification models were proposed

  • Developments in microscopy allowed better examination of internal structures
  • Improvement in understanding of biochemical processes
• The three domains


  • Archaea
  • Eukarya
  • Bacteria
• Organisms in the domain Archaea

  Bacteria, usually living in extreme environments
• Kingdoms in the domain Eukarya

  • Plants
  • Animals
  • Fungi
  • Protists
• How evolutionary trees are created

  Examining the DNA of different species and analysing how similar the sequences are