Kingdom Monera (Bacteria)

These are prokaryotic, unicellular organisms, which can be autotrophic or heterotrophic.

Archaebacteria – Found in extreme environments

• Halophiles (live in salty environments)
• Thermoacidophiles (survive in hot and acidic conditions)
• Methanogens (produce methane, found in cow intestines)

Eubacteria (True Bacteria)

• Cyanobacteria (Blue-green algae) – Perform photosynthesis
  • Nostoc
  • Anabaena
• Pathogenic Bacteria (cause diseases)
  • Vibrio cholerae (Cholera)
  • Salmonella typhi (Typhoid)
  • Clostridium tetani (Tetanus)
  • Xanthomonas citri (Citrus canker)

Mycoplasma – Smallest cells, lack cell walls

Kingdom Protista

Eukaryotic unicellular organisms with both plant- and animal-like characteristics.

Chrysophytes – Golden algae & diatoms

• (Diatom)

Dinoflagellates – Marine plankton

• Gonyaulax (Causes red tides)

Euglenoids

• Euglena (Both autotrophic and heterotrophic)

Protozoans