Question to you: What do nephrons filter?\nOptions:\n- (A) Blood\n- (B) matter\n- (C) solutes\n- (D) Energy\n- (E) SO2\n- (F) Gases\n- (G) Energy.\n- (H) cations.
Let's reason step-by-step:
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Nephrons are the structural and functional units of the kidneys. Blood is filtered in the kidney. Nephrons filter blood. Final answer: (A).
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