What determines how much energy a human can receive from food?
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a. how much the food molecules weigh
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b. how much oxygen the food contains
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c. how much energy the food molecules have
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d. how much nitrogen the food contains
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Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen