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auxotroph vs. prototroph

auxotroph

[ awk-suh-trof, -trohf ]
noun
  1. a mutant organism, especially a microorganism, that has a nutritional requirement not shared by the parent organism.

prototroph

[ proh-tuh-trof, -trohf ]
noun
  1. a microorganism that has the same nutritional requirements as the parent organism.
  2. an organism or cell capable of synthesizing all its metabolites from inorganic material, requiring no organic nutrients.