Biology 18.3
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  • 1. Kingdoms and Domains 18.3
  • 2. Domain
    Most inclusive taxonomic category; larger than a kingdom.
  • 3. Bacteria
    Domain of unicellular prokaryotes that have cell walls containing peptidoglycan.
  • 4. Eubacteria
    Kingdom of unicellular prokaryotes whose cell walls are made up of peptidoglycan.
  • 5. Archaea
    Domain of unicellular prokaryotes that have cell walls that do not contain peptidoglycan.
  • 6. Archaebacteria
    Kingdom of unicellular prokaryotes whose cell walls that do not contain peptidoglycan.
  • 7. Eukarya
    Domain of all organisms whose cells have nuclei, including protists, plants, fungi, and animals.
  • 8. Protista
    Kingdom composed of eukaryotes that are not classified as plants, animals, or fungi.
  • 9. Fungi
    Kingdom composed of heterotrophs; many obtain energy and nutrients from dead organic matter.
  • 10. Plantae
    Kingdom of multicellular photosynthetic autotrophs that have cell walls containing cellulose.
  • 11. Animalia
    Kingdom of multicellular eukaryotic heterotrophs whose cells do not have cell walls.
  • 12. Key Concept
    What are the six kingdoms of life as they are now identified?
    The six-kingdom system of classification includes the kingdoms Eubacteria, Archaebacteria, Protista, Fungi, Plantae, and Animalia.
  • 13. Key Concept
    What is the three-domain system of classification?
    The three domains are the domain Eukarya, Which is composed of protists, fungi, plants, and animals; the domain Bacteria, which corresponds to the kingdom Eubacteria; and the domain Archaea, which corresponds to the kingdom Archaebacteria.