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Prokaryotes
Terms & Oncepts
4
Biology
Undergraduate 1
12/12/2011

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Term

characteristics of prokaryotes

 

Definition
  • S: nucleus is not enclosed
  • S: lack membrane-enclosed organelles
  • unicellular, filamentous chain or cells, or colonial
  • binary fission NO mitosis
  • many form biofilms
  • have distrinctive modes of locomotion: flagells, gliding mechanisms, gas vesicles.
  • cell wall present for protection
Term
how did organisms proliferat and move onto land
Definition
oxygenic photosynthesis by cyanobacterium increased the amount of oxygen in the atmospher and eventually led to the formation of an ozone layer, shielding land organism from harmful UV rays
Term
Bacteria & Archae
Definition
  • Typically have more metabolic pathway diversity than the eukaryotes
Term
Characteristics of Archae
Definition
  • Usually chemotrophs
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