Microbiology Demystified

Different classifications of organisms are:

• Bacteria
  
  
  • Eubacteria
  
  
  
  


• Archaea
  •Archaebacteria


• Eukarya
  
  
  • Protista
  
  
  • Fungi
  
  
  • Plantae
  
  
  • Animalia
  
  
  
  

The three domains are archaea, bacteria, and eukarya (see Fig. 9-2).

• Archaealack muramic acid in the cell walls.

CHAPTER 9 Classification of Microorganisms^143

Fig. 9-2. Three-domain taxonomy.

Eubacteria

Gram-positive bacteria Mycoplasmas Gram-negative bacteria

Eucarya

Animals Plants Fungi Protists

Archaea

Halophiles Methanogens Thermo-acidophiles