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
• New classification models were proposed due to developments in microscopy allowing better examination of internal structures and 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