| DOMAIN | Bacteria | Archaea | Eukarya | |||
|---|---|---|---|---|---|---|
| KINGDOM | Eubacteria | Archaebacteria | “Protista” | Fungi | Plantae | Animalia |
| CELL TYPE | Prokaryote | Prokaryote | Eukaryote | Eukaryote | Eukaryote | Eukaryote |
| CELL STRUCTURES | Cell walls with peptidoglycan | Cell walls without peptidoglycan | Cell walls of cellulose in some; some have chloroplasts | Cell walls of chitin | Cell walls of cellulose; chloroplasts | No cell walls or chloroplasts |
| NUMBER OF CELLS | Unicellular | Unicellular | Most unicellular; some colonial; some multicellular | Most multicellular; some unicellular | Most multicellular: some green algae unicellular | Multicellular |
| MODE OF NUTRITION | Autotroph or heterotroph | Autotroph or heterotroph | Autotroph or heterotroph | Heterotroph | Autotroph | Heterotroph |
| EXAMPLES | Streptococcus, Escherichia coli | Methanogens, halophiles | Amoeba, Paramecium, slime molds, giant kelp | Mushrooms, yeasts | Mosses, ferns, flowering plants | Sponges, worms, insects, fishes, mammals |