All four of the basic blood types can be either be positive or negative, they are A,B,AB, and O. Blood types are used to used define each person blood, they help to make blood transfusions more successful by matching up the blood types.
The four basic blood types are A, B, AB, and O.
Karl Landsteiner
Te four basic blood types are O, A, B and AB. They are named for the types of antigens they carry. O has no antigens, A has A antigens, B has B antigens and AB carries both.
One of the four basic types of wave interactions is diffraction, but reflection, refraction, and interference are.
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The four main blood types are A, B, AB, and O. Each blood type is determined by the presence or absence of specific antigens on the surface of red blood cells. Additionally, blood types are classified based on the presence of the Rh factor, resulting in positive or negative blood types.
A, b, ab, o
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The 1898 discovery of the four blood types (A, B, AB, O) did not directly lead to the discovery of the Rh factor, which was identified later in 1940. The discovery of the four blood types laid the foundation for understanding blood transfusions and paved the way for safer and more successful blood transfusions in medicine.