The most common chronic blood-borne infection in the United States is ____

a. HBV c. HIV
b. HCV d. HAV

B

Psychology

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What structures does the trophoblast NOT become?

a. amnion b. placenta c. umbilical cord d. embryo

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Who said, "I think, therefore I am"?

a. Rene Descartes b. William James c. Aristotle d. Immanuel Kant

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