Mike is able to maintain this sleep schedule because He has a hereditary condition that confers unnaturally precise CLOCK gene expression (Option A).
Adaptations are phenotypic features that naturally appear in a population as a consequence of genetic variation which are expressed to determine the level of the trait.
In this case, it is expected that Mike exhibit certain genetic features associated with his circadian rhythm.
In conclusion, Mike is able to maintain this sleep schedule because He has a hereditary condition that confers unnaturally precise CLOCK gene expression (Option A).
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