humans may have one or four blood types: A, B, AB, or O. explain why a person with tupe O blood is referred to as univer
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humans may have one or four blood types: A, B, AB, or O. explain why a person with tupe O blood is referred to as univer
humans may have one or four blood types: A, B, AB, or O. explain why a person with tupe O blood is referred to as universal donor yet can recieve only from othe rindividuals with type O blood 5 sentences