3 Domain System

• ARACHEA

  • Bacteria that are capable of living in an extreme environment.
• Methanogen - found in the intestinal tract of humans and some animals and in areas where there is no oxygen.
• Halophiles

  • live in areas with very high salt concentration (dead sea).
• Thermoacidophiles

  • live in hot acidic environments such as sulfur spring.
• EUBACTERIA

  They live in an abandoned environment and it is the most abundant prokaryote.
• Bacilli (Bacillus) - rod shapes

  Cocci (Coccus) - spheres or round

  Spirilla - corkscrew shaped
• Pathogenic Bacteria

  Bacteria that causes diseases, like Tetanus, diarrhea, bronchitis, pneumonia, tuberculosis, botulism - food poisoning.
• Protist - plant-like, animal-like, and fungus-like.

  Unicellular cells, but some form volumes.
• Fungus-like protist

  • Ex. plasmodium
  • Slime molds found in decaying leaves/rotting log, bright yellow or orange color.
• Animal-like Protist

  • Ex. Amoebas, Paramecium
• C. Plant-like protist known as “phytoplankton” floating plant
• Dinoflagellates - swim using their two whip-like flagella known as red tide.
• Saxitoxin

  • Poison produced by red tide.
• Diatoms - pasture of the sea

  • Many more organisms feed on them.
  • Produced a glassy protective covering.
• Fungi - mushroom molds and yeast

  • Don’t have chlorophyll and can’t manufacture food through photosynthesis.
  • they are heterotrophic feasting on decomposing organic matter.
  • not motile but their hyphae can grow rapidly.
• Mycelium - The body of fungus

  • Composed threadlike filaments called hyphae.
• Yeast - used in making bread, wine, and cheese
• Mushroom - are edible fungus

  • They provide rage of antioxidant