classification

• What is classification?


  The process of organizing living organisms into groups based on similarities and differences.
• What are the levels of classification?

  Kingdom, Phylum, Class, Order, Family, Genus, Species.
• What are the three domains?


  Archaea, Bacteria, and Eukarya.
• What is Archaea?


  A domain of prokaryotic organisms living in extreme environments, e.g., hot springs.
• What is Bacteria?

  A domain of prokaryotic organisms with no nucleus, e.g., E. coli.
• What is Eukarya?


  A domain of organisms with cells that have a nucleus, e.g., animals and plants.
• How does the Three-Domain System differ from the Five Kingdom system?


  It separates prokaryotes into two domains: Archaea and Bacteria, instead of one kingdom.
• Why was the Three-Domain System developed?


  Based on genetic and molecular evidence, showing distinct differences in prokaryotes.