Vaccines are composed of ________ that stimulate an active immunity to the pathogen.

A) memory B cells that respond to a microorganism
B) memory T cells that respond to a microorganism
C) the non-pathogenic portion of the microorganism
D) the pathogenic portion of the microorganism
E) antibodies to a microorganism


Ans: C) the non-pathogenic portion of the microorganism

Biology & Microbiology

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A dance that recruits other bees into foraging 90 degrees to the right of the sun is indicated by flying ____.

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