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Survey of Archaea

Archaea classification, characteristics, etc.

TermDefinition
Prokaryotic Shapes -Coccus: circular -Coccobacillus: raggedy circular -Bacillus: Longer, circular -Vibrio: Elongated, ovalular -Spirillum: Gummy-worm shaped -Spirochete: Long, skinny chain -Pleomorphic: Blend of several shapes -Star: Star
Prokaryotic Reproduction - Asexual (Binary Fission, snapping division, budding)
Vivparity - Form of reproduction - Live offspring emerge from body of dead mother cell
Prokaryotic Classification Three Domains: Archaea, Bacteria, Eukarya
Archaea - Lack peptidoglycan - AUG codon codes methionine - Reproduce asexually (Binary fission, budding, fragmentation) - Cocci, Bacilli, Spirals, or Pleomorphic - Not known to cause disease
Extremophiles - Req. extreme conditions to survive (temp, pH, salinity) - Ex: thermophiles & halophiles
Thermophiles - Does not function properly below 45 c* - Hyperthermophiles req. over 80 c* - Ex: Geogemma & Pyrodictium
Halophiles - Live in extremely saline habitats - Depend on greater than 9% NaCl for cell wall integrity - Contain red/orange pigments - Most studied: Halobacterium salinarum
Methanogens - Largest group of archaea - Converts carbon dioxide, hydrogen gas, and organic acids into methane gas - Converts organic wastes to methane Applicational use: sewage treatment
Created by: chianti
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