1.7 Classification

• What is binomial name made up of?

  Genus + species
• Why is binomial name used?

  • See how closely two organisms are related
  • Helps identify species in diff locations
• What is taxonomy?

  • Science of classification
  • Put organisms into groups based on similarities + differences
• What is the antonyms of classification system? Hence what are they called?

  King Prawn Curry Or Fat Greasy Sausages

  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
• Where did the 3 domain system come from?

  • Data from molecular phylogeny
  • Compare sequence of amino acids in proteins between 2 organisms
  • The more similar, the more closely related
  • Can find common ancestors
• What was the old classification system? What was prokarotes reclassified into? Why?

  5 kingdoms

  Into Archae + bacteria - due to lack of nucleus

  Molecular phylogeny showed they were more distantly related than we previously thought
• What is the 3 domain system?

  Eukarya -

  • Linear DNA
  • Membrane-bound organelles
  • Cell wall made of cellulose
  • Multi-cellular

  Bacteria -

  • Circular DNA
  • No membrane-bound organelles
  • Single celled

  Archea-

  • Circular DNA
  • No membrane-bound organelles
  • Single celled
• How do scientists review their work?

  • Publish in scientific journal
  • Taken to scientific committee - open to peer review