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Each B cell produces a single species of antibody, each with a unique antigen-binding site
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okay, but bill nye notes for what? you need to be more specific
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Listen to pronunciation. (sel) In biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm.
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or do you mean phone number?