The normal human microbiota is considered part of the 1st line of defense because

A. microbiota cause an inflammatory response, eliminating pathogens.
B. resident bacterial cells stimulate phagocytosis of pathogens.
C. microbial antagonism keeps potential pathogens in check.
D. pathogens and normal biota cannot exist in the same location.


Answer: C

Biology & Microbiology

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