1. Which primary characteristic is unique for the immune response?
2. In which structure does B lymphocytes mature and undergo changes that commit them to becoming B cells?
3. What is the term for the process during which lymphoid stem cells migrate and change into either immunocompetent T cells or immunocompetent B cells?
4. Which type of immunity is produced by an individual after either natural exposure to the antigen or after immunization against the antigen?
5. What type of immunity is produced when an immunoglobulin crosses the placenta?