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If this is what u r talking about we just did this in class
New ways to preserve and transport blood for blood transfusions were discovered. Blood transfusion safety was improved. Scientists discovered that elements of blood could be separated by centrifuge. Scientists discovered that plasma could be preserved by freezing.How did the 1898 discovery of blood types affect society? Check all that apply. New ways to preserve and transport blood for blood transfusions were discovered. Blood transfusion safety was improved. Scientists discovered that elements of blood could be separated by centrifuge. Scientists discovered that plasma could be preserved by freezing. Answer: they are all correct