the world > life > biology > balance of nature > organisms in relation to habitat > [adverb]
facultatively1887
obligately1915
heterotrophically1935
prototrophically1957
saprobiotically1957
chemoautotrophically1961
sympatrically1970
auxotrophically1976
1976 Ann. Rev. Microbiol.30 395 A problem that has long hampered Caulobacter workers in the efficient isolation of auxotrophically marked strains is the relative resistance to mutagenesis exhibited by several Caulobacter species.