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Type: Multiple-Choice
Category: Circulatory and Immune Systems
Level: Grade 9
Score: 1
Author: ptbabin
Last Modified: 5 months ago

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Circulatory and Immune Systems Question

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Grade 9 Circulatory and Immune Systems

The protein that contains iron and gives red blood cells their red color is
  1. plasma.
  2. hemoglobin.
  3. capillary.
  4. blood.
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