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    Question

    How big are red blood cells in

    diameter?
    A 7.5 ┬╡m Correct Answer Incorrect Answer
    B 2.0 ┬╡m Correct Answer Incorrect Answer
    C 4.0 ┬╡m Correct Answer Incorrect Answer
    D 40.0 ┬╡m Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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