This document describes Carl Linnaeus' system for classifying living organisms into a taxonomic hierarchy consisting of Domain, Kingdom, Phylum, Class, Order, Family, Genus and Species. It provides details on the three Domains of Archaea, Bacteria and Eukarya, and describes key distinguishing characteristics used for classification such as cell structure, number of cells, mode of nutrition and habitat.

3. • is a Swedish botanist
who developed a 7-level
(taxa) classification
system based on
similarities between
organisms

4. • Domain
– Kingdom
• Phylum
• Class
• Order
• Family
• Genus
• Species

5. • are the broadest taxonomic
classification of living organisms
• The three Domains:
• Archaea
• Bacteria
• Eukarya

6. • Archaea
–Archaebacteria
• Bacteria
–Eubacteria
• Eukarya
–Protist
–Fungi
–Plantae
–Animalia

7. 1. Cell Type
(prokaryotic or eukaryotic)
2. Cell Number
(unicellular or multicellular)
3. Feeding Type
(autotroph or heterotroph)

8. • Prokaryotic
– describes an organism with cells
that do NOT have a nucleus
• Eukaryotic
– describes an organism with cells
that do have a nucleus

9. • Unicellular
– organisms are made up of one
cell
• Multicellular
– organisms are made up of more
than one cell

10. •Autotrophic
– makes its own food
•Heterotrophic
– gets nutrients from the food it
consumes

11. “extreme bacteria”
• Cell Type
–Unicellular
• Cellular Organization
–Prokaryotic
• Mode of nutrition
–Autotrophic or Heterotrophic
Means that some species are autotrophs and
some are heterotrophs

12. “extreme bacteria”
• Reproduction
– asexual
• Cell Wall
– cell walls without peptidoglycan
• Habitat
– live in extreme habitats such as hot springs, geysers,
volcanic hot pools, brine pools, black smokers

13. “extreme bacteria”
• Archaebacteria can live deep in the
ocean near geothermal vents called
black smokers
• There is no light, so they carry out
chemosynthesis instead of
photosynthesis

15. • Cell Type
– Prokaryotic
• Cellular Organization
– Unicellular
• Mode of nutrition
– Autotrophic or heterotrophic
• Reproduction
– asexual
• Cell Wall
– Thick cells walls with peptidoglycan
• Habitat
– everywhere!!! (even inside you)

17. “Catch All Kingdom”
• Cell Type
– Eukaryotic
• Cellular Organization
– Most unicellular, some multicellular
• Mode of Nutrition
– Autotrophic and heterotrophic
• Reproduction
– sexual and asexual
• Cell Wall
– Some with cell walls containing cellulose
• Habitat
– all aquatic

19. • Cell Type
– Eukaryotic
• Cellular Organization
– Most multicellular
• Mode of Nutrition
– Heterotrophic (decomposers)
• Reproduction
– sexual and asexual
• Cell Wall
– cell walls containing chitin
• • Habitat
– terrestrial

21. • Cell Type
– Eukaryotic
• Cellular Organization
– multicellular
• Mode of Nutrition
– Autotrophic
• Reproduction
– sexual
• Cell Wall
– cell walls containing cellulose
• • Habitat
– aquatic and terrestrial

23. • Cell Type
– Eukaryotic
• Cellular Organization
– multicellular
• Mode of Nutrition
– heterotrophic
• Reproduction
– mostly sexual
• Cell Wall
– none
• Habitat
– aquatic and terrestrial