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Biology 5 Online
OpenStudy (anonymous):

Which of the following statements is true? A. All blood cells begin in the bone marrow as stem cells. B. Red blood cells are responsible for fighting disease and infection. C. Platelets transport oxygen throughout the blood stream. D. White blood cells are small, sticky particles that allow blood to form clots.

OpenStudy (anonymous):

A. All blood cells begin in the bone marrow. Red blood cells transport oxygen. Platelets form clots. White blood cells fight disease and infection.

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