A) the presence of interleukins
B) innate immunity.
C) the presence of cytokines
D) Toll-like receptors
E) all of these.

A) cytokines and nongland cells
B) vertebrate immune cell communication and immunosynapse
C) inflammation and second line of defense
D) amoebocytes and hemocytes
E) antimicrobial peptides and opsonin

A) natural killer cells
B) neutrophils
C) eosinophils
D) natural killer cells and neutrophils
E) neutrophils and eosinophils