What type of immunity do insects have? 

The part of the antigen that the immune system recognizes and to which antibodies bind is called  __________.

All of the following are components of the adaptive immune system, except:

Which of the following are signaling molecules released by immune cells that primarily recruit other immune cells to mount a response?

Which of the following cells have the primary function of presenting antigens to T cells, connecting the innate and adaptive immune systems?