The first and second lines of defense against microbial invasion are part of
A) adaptive immunity.
B) microbial antagonism.
C) innate immunity.
D) species resistance.
E) both species resistance and adaptive immunity.

Question

Quizplus · Accepted Answer

The first and second lines of defense against microbial invasion are part of innate immunity, which includes physical barriers, chemical barriers, and various immune responses that are non-specific and act immediately or within hours of an antigen's appearance in the body.

The First and Second Lines of Defense Against Microbial Invasion