Describe the cause of different blood type groups.

Biology

1 answer:

adell [148]4 years ago

3 0

Answer:

Scientists believe that the different types we know emerged as early humans adapted to infectious diseases.

Explanation:

Different human blood types probably emerged to ward off infectious diseases. The incompatibility of some blood types, however, is only an "accident" of evolution. But this is a relatively recent problem, since blood transfusion has been around for only a few hundred years.

There are four main blood types. The oldest is B, which must have originated about 3.5 million years ago - it existed even before the human species evolved from its hominid ancestors, from a genetic mutation that modified one of the sugars in the surface of red blood cells.

Approximately 2.5 million years ago, mutations inactivated sugar, resulting in type O blood, which has neither type A nor B. sugar. AB blood, as it is easy to suppose, is covered by both sugar A and sugar by B.

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<h3>What are NK cells?</h3>

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Learn more about NK cells here:

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