English, asked by jamesraj2627, 3 months ago

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1901: identification of human blood types
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Answered by sohailbanday007
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Answer:

The human ABO blood groups were discovered by Austrian-born American biologist Karl Landsteiner in 1901. Landsteiner found that there are substances in the blood, antigens and antibodies, that induce clumping of red cells when red cells of one type are added to those of a second type.

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