Answer:
the branch of science concerned with classification, especially of organisms; systematics.
Explanation:
Answer:
(B) agglutination with anti-A antibodies.
Explanation:
ABO blood type is based on two types of antigens: A and B antigens. The anti-A antibodies react with antigen A while anti-B antibodies react with antigen B.
Blood type A has antigen A on the surface of its red blood cells and anti B antibodies in its plasma. Due to the presence of antigen A on its red blood cells, the blood type A shows agglutination with anti A antibodies.
Archaea actually are a domain! Originally they were thought to be bacteria, but have since been classified in their own domain: archaea.