Answer :

Final answer:

B-lymphocytes in the bone marrow produce antibodies crucial for immune responses.


Explanation:

B-lymphocytes (B-cells) are responsible for the production of antibody molecules during adaptive immunity. These lymphocytes are produced in the bone marrow and differentiate into antibody-secreting plasma cells. Plasma cells are activated B cells that secrete antibodies, which bind to specific antigens for immune responses.


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