ARCHAEA

Reproduction
     Asexual
          - binary fission
          - endospore
     Sexual
          - conjugation

Types

Methanogens
     - oxygen free habitats
     - produce methane gas
     - extract energy from hydrogen gas and carbon dioxide
     - in bogs, deep soil, mud bottoms of lakes
     - reminants expel CH4


Extreme Halophiles
     - extra high salt contents
     - with unique glycoproteins
     - accumulate K ions and keep out Na ions
     - generate energy by aerobic respiration
     - use bacteriorhodopsin to perform photosynthesis
     - carry carotenoids for UV protection

Extreme Thermoacidophile
     - hot and acidic water
     - sulfur-rich hot springs, hydrothermal vents (110 C)
     - obligate anaerobes
     - uses S instead of O2