11. Adaptive immunity is based upon

(A) traits common to groups of pathogens

(B) antigen-specific recognition;

(C) maternal provision of antibodies to offspring

(D) plants being exposed to new pathogens

(E) having exhausted all options for innate immunity responses

答案：登入後查看
統計： A(0), B(1), C(1), D(0), E(0) #3828126