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The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.
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Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine
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The same agricultural practices are used in every country of the world. select the best answer from the choices provided t f
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The proteins that extend completely through the plasma membrane are proteins....
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