Classification

• What is classification in biology?

  Organizing living organisms into groups
• What were organisms traditionally classified by?

  Observable characteristics
• What is included in the classification of organisms?

  Cell structure visible with a microscope
• What is the five kingdom classification system?

  A system to classify living things into kingdoms
• What are the five kingdoms in the classification system?

  • Animals
  • Plants
  • Fungi
  • Prokaryotes
  • Protists
• How are kingdoms subdivided in the classification system?

  Into smaller groups with common features
• What are the levels of classification after kingdoms?

  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
• Why is the five kingdom classification system considered outdated?

  Technology and understanding have advanced
• What advancements have influenced classification systems?

  Biochemical processes and genetics
• Who proposed the three domain system of classification?

  Carl Woese
• What did Woese discover about Prokaryotes?

  They are not as closely related as thought
• What are the two groups that Prokaryotes were split into?

  Archaea and Bacteria
• What are the three domains of life proposed by Woese?

  • Archaea
  • Bacteria
  • Eukarya
• What characterizes organisms in the Archaea domain?

  Similar to bacteria but genetically different
• Where were Archaea first found?

  Hot springs and salt lakes
• What does the Bacteria domain contain?

  True bacteria like E. coli
• What organisms are included in the Eukarya domain?

  Fungi, plants, animals, and protists
• How do Archaea and Bacteria compare to mushrooms?

  More different than we are to mushrooms
• What is an example of how technology advanced classification?

  RNA sequencing revealed genetic differences