Which of the following is not characteristic of the adaptive immune system?
A. It is antigen-specific.
B. It is systemic.
C. It has memory.
D. It is specific for a given organ.
Answer:D
Which of the following is not characteristic of the adaptive immune system?
A. It is antigen-specific. B. It is systemic. C. It has memory. D. It is specific for a given organ.