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Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan Amoeba proteus protozoan A human chromosome A human chromosome A human chromosome A human chromosome A human chromosome A human chromosome red blood cells red blood cells red blood cells red blood cells red blood cells Cells under microscope Cells under microscope Cells under microscope Cells under microscope red blood cells red blood cells red blood cells red blood cells red blood cells