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What percentage of nature vs. nurture dictates human intelligence?
100% Nature
75% Nature; 25% Nurture
50% Nature; 50% Nurture
25% Nature; 75% Nurture
100% Nurture
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Surface of the heart.
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The boundaries of the internal chambers of the heart can be seen on the surface of the heart as elevated mounds and grooves that are filled with fat, blood vessels, and nerves.  
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