Which of the following most accurately describes a polar covalent bond?
A. the interaction of a hydrogen connected to an atom with a high electronegativity, and an electronegative atom of another molecule
B. the interaction of an atom with very high electronegativity and an atom with very low electronegativity
C. the unequal sharing of electrons between an atom with a partial positive charge and an atom with a partial negative charge
D. the equal sharing of electrons between atoms of identical or similar electronegativities
E. None of these choices accurately describe polar covalent bonds.
Answer: C
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Which discovery supports the hypothesis that evolution of the lactase-persistence trait was driven by the use of milk in pastoralist cultures?
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