Which proteobacteria group is composed of oligotrophs and
contains the human pathogens Chlamydia and Rickettsia?
A. deltaproteobacteria
B. epsilonproteobacteria
C. betaproteobacteria
D. alphaproteobacteria
contains the human pathogens Chlamydia and Rickettsia?
A. deltaproteobacteria
B. epsilonproteobacteria
C. betaproteobacteria
D. alphaproteobacteria