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Molecular Biology › View

 a substance such as a fat, a protein, or a carbohydrate that a living thing needs to survive

A. nutrients

B. calorie

C. vitamins

D. minerals

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Cardiovascular System › View

Desoxygenated blood flow into the heart into the 

A. Left atrium

B. Right atrium

C. Left ventricle

D. Right ventricle

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