1. Pathogens have on their surface that bind to B cells with complementary .
2. B cells that bind to the pathogen divide, forming of identical cells with the same antigen.
3. Some cells of the clone develop into short-lived that secrete specific for the antigen.
4. Some cells develop into long-lived , which produce larger of memory and effector cells upon later exposure to the same antigen.

Explanation:

1. Pathogens have __antigens on their surface that bind to B cells with complementary _phagocyte.

2. B cells that bind to the pathogen divide, forming __plasma çells of identical cells with the same antigenantibodies

3. Some cells of the clone develop into short-lived ___cells that secrete ___antibodies specific for the antigen.

4. Some cells develop into long-lived ___cells, which produce larger ___immunology of memory and effector cells upon later exposure to the same antigen.

yes it is weird but true