Which taste receptors are located approximately in the center of the tongue?
A) Sweet, salty, and sour
B) Salty and sour
C) Sour only
D) Sweet and sour
C
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Tuberculosis is caused by:
A) a fungus. B) a virus. C) a protozoon. D) a bacterium.
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Dangerous organisms that can grow in a variety of environments and are capable of producing toxic substances are known as:
A) toxins. B) bacteria. C) viruses. D) biologicals.
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