The correct answer is (c) discover antigens in body fluids.
B lymphocytes act as antigen presenting cells that recognizes and displays the antigen to the white blood cells. These cells process the antigens that are present in body fluids. Professional antigen presenting cells includes B-lymphocytes, macrophages, dendritic cells, etc.
A habitat, Is the physical area where an organism lives.
B) A long time increase in the Earths Average temperature
B. is a protective structure made of cellulose fibrils
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