w7 gen bio

• Taxonomy


  The branch of biology that classifies all living things
• Binomial nomenclature


  The system of giving each type of organism a genus and species name
• Taxonomic hierarchy


  Carolus Linnaeus' classification system
• Taxonomic ranks

  • Domain
  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
• Domain


  The highest taxonomic rank, introduced in 1990, with 3 domains: Bacteria, Archaea, and Eukaryota
• Kingdom


  The highest taxonomic rank before domains were introduced, including Protista, Animalia, Plantae, and Fungi
• Phylum


  The taxonomic rank after kingdom, more specific than kingdom but less specific than class
• Class


  The most general taxonomic rank proposed by Linnaeus, with 108 different classes in the kingdom Animalia
• Order


  The taxonomic rank more specific than class, with 19-26 orders in the class Mammalia
• Family


  The taxonomic rank more specific than order, with 12 families in the order Carnivora
• Genus


  The taxonomic rank more specific than family, the first part of an organism's scientific name
• Species


  The most specific major taxonomic rank, with an estimated 8.7 million different species on Earth
• Homo sapiens is the scientific name for humans, with Homo as the genus name and sapiens as the species name
• Parastratiosphecomyia stratiosphecomyioides is the longest species name, belonging to the soldier fly
• How to make a dichotomous key

  1. List down the characteristics

  2. Organize the characteristics in order

  3. Divide the specimens

  4. Divide the specimen even further

  5. Draw a dichotomous key diagram

  6. Test it out
• Dichotomous key


  A tool that helps identify unknown organisms to some taxonomic level, offering two choices for each step based on key characteristics
• Dichotomous means "divided into two parts"
• Dichotomous keys can be presented in a descriptive or diagrammatic method