Answers

2015-12-08T01:43:39+05:30
We have diffrent blood streams and there are 4 diffrent blood types and our parents have somthing to do with it
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2015-12-08T08:58:28+05:30
The Rh factor is a type of protein on the surface of red blood cells. Most people who have the Rh factor are Rh-positive. Those who do not have the Rh factor are Rh-negative.That only means positive and negative blood groups.
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