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.
Neutralisation is when you have a strong acid and also a strong base (alkali) E.g 7 ph.
Homologous structures (Not to be confused with Homologous pairs)
I believe the answer is B. <span>The antibodies on B cells bind to the antigens on the pathogen's surface.
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Germ-line mutations are mutations that would be passed down to future generations, and recombinations are where the information each parent passes down to the offspring is shuffled.
The genetic variation would have to come from random events: False
Only alternate generations would express any genetic variable: False
Body cell mutations would be the only source of heritable genetic variation: False
There would be no new heritable genetic variation possible in the population: True
