| − | '''Heterotrophs''' are organisms that are incapable of [[Autotroph|autotrophy]] and rely on other organisms for nutrition.<ref>heterotroph. (n.d.). The American Heritage® Dictionary of the English Language, Fourth Edition. Retrieved June 30, 2007, from Dictionary.com website: http://dictionary.reference.com/browse/heterotroph</ref> | + | '''Heterotrophs''' are organisms that are incapable of [[Autotroph|autotrophy]] and rely on other organisms for nutrition.<ref>The American Heritage® Dictionary of the English Language, Fourth Edition: [http://dictionary.reference.com/browse/heterotroph"Heterotroph"]</ref> |