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Asked by 524bm1926 to Peter, Jonathan, Grace, Doris, David, Ann on 3 Jun 2019.
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Grace Kago answered on 3 Jun 2019: last edited 2 Jun 2019 9:09 pm
due to the presence of a protein called hemoglobin. Hemoglobin bound to oxygen absorbs blue-green light, so it reflects red-orange light into our eyes, so it looks red (Chemicals appear particular colors to our eyes based on the wavelengths of light they reflect)
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