Question

Why does a human have different blood groups?​

Answer 1

Hope it's helps you Friend

Answer 2

Answer:

Human blood types most likely came to exist to fend off infectious diseases. The incompatibility of some blood types, however, is just an accident of evolution. Blood type A is the most ancient, and it existed before the human species evolved from its hominid ancestors. ...

hope it helps you

Explanation:

in my opinion all are different

we are not same .....all have a different habit

so how we all got a same blood ....

hehe just for fun i type this

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