Q:

The diameter of a red blood cell is approximately

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The diameter of a red blood cell isapproximately:


  1. 7 × 10 ^-3 m
  2. 7 × 10 ^-6 m
  3. 7 × 10^ -9 m
  4. 7 × 10 ^-10 m

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B. 7 × 10^-6 m

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