Clostridium, Bacteroides, and the methane-producing archaea (methanogens), are called obligate anaerobes because their energy-generating metabolic processes are not coupled with the consumption of oxygen.
As far as I know it should be D. A dolor flare as it may harm satellite and aircraft flying near poles
I believe is the thermoreceptors present in the skin as well as part of the brain called hypothalamus.
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The answer is A. the estimated number of residents who would have voted for channel 1 is higher for group A than Group B.