B and T cells become activated and divide to produce identical cells when _____.
A) activated by an antigen
B) major histocompatibility genes are expressed
C) activated by the presence of cancerous cells
D) plasma cells begin to produce and secrete antibodies
E) killer T cells bind to any pathogen

Question

Quizplus · Accepted Answer

B and T cells become activated and divide in response to specific pathogens or foreign substances, which are recognized by their corresponding antigen receptors. This is known as the adaptive immune response.

B and T Cells Become Activated and Divide to Produce