Answer:
the answer is B, The activation energy must be reached.
Explanation:
Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations. Random mutations are the initial cause of new heritable traits. For example, a rabbit can't choose to have a different fur color.
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The alcoholic fermentation would produce alcohol and CO2 rather than lactic acid. This could be detrimental to the runner. I don’t know if the person would get drunk, though, theoretically this is
possible if the alcohol can get into the bloodstream but it could definitely cause some problems with muscle tissue, since CO2 would take the place of the oxygen we need.