Answer:
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Explanation:
They are perpendicular because their slopes are equal.
Answer:
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Explanation:
The answer to this question is B (APEX)
Due to the presence of antigens and antibodies, blood can only be donated by compatible donor types.
<h3>What is the ABO blood group?</h3>
There are four main human types of blood group which are; A, AB, B and O.
- A person who has the blood group A has antigen a.
- A person who has blood group B has antigen b
-A person who has blood group AB has both antigens a and b
- A person who has blood group O has neither antigen a nor b
People who have blood group O are universal donors while people who have blood group AB are universal recipients. Due to the presence of antigens and antibodies, blood can only be donated by compatible donor types.
Learn more about ABO blood groups:brainly.com/question/20335798
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