A group of college students working on a project on bio-gas have found some bacteria in the bio-gas plant. These bacteria can utilize methane as their source of energy and do not need oxygen for their survival. What kind of bacteria could they be?
A. Archaebacteria
B. Eubacteria
C. Probacteria
Explanation: Archaebacteria include the phyla methanogens, which produce methane for energy and do not need oxygen for their survival. Edmentum confirmed.