Put the Following Events in Order from 1 to 7

Put the following events in order from 1 to 7 as related to adaptive immunity.
____ B cells (specialized lymphocytes) divide, and each new B cell can produce antibodies
____ antibodies bind to antigen
____ B cells (specialized lymphocytes) respond to an antigen presented in the lymph node
____ lymphocytes encounter an antigen
____ lymphocytes migrate to lymph node
____ an antigen enters the circulation
____ macrophages and "killer cells" remove or neutralize the antigen