Question

What is the most common human blood type, and is it positive or negative?

a) Type A - Positive
b) Type B - Negative
c) Type O - Positive
d) Type AB - Negative

Answer 1

The most common human blood type is Type O and it is positive. Type O blood is the universal donor because it lacks A and B antigens, while Type AB positive blood is the universal acceptor because it has both A and B antigens.

Step-by-step explanation:

The most common human blood type is Type O and it is positive. Type O blood, which has neither A nor B antigens on the surface of red blood cells, is considered the universal donor because it can be transfused into people of any blood type without eliciting an immune response. On the other hand, Type AB positive blood is considered the universal acceptor because it has both A and B antigens.