These preferences may have been advantageous in our evolutionary history, when food was less reliably available
-from quizlet
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.
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Explanation:
the last option is the correct answer
Answer:
Plants have cell walls, mammals have cell membranes.
