Which gammaproteobacteria are facultatively anaerobic, gram-negative rods that inhabit the intestinal tracts of humans and other animals?

a. Pseudomonadales
b. Vibrionales
c. Enterobacteriales
d. Legionellales

Ans: c. Enterobacteriales

Biology & Microbiology

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About how long have wastewater treatment plants been in existence?

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