What the difference between the one with the red dot and the one with the solid red. Explain the whole thing in general actually. If you can. THX

Answer:
A serum containing anti-A antibodies is mixed with some of the blood. ... For instance, if an individual's blood sample is agglutinated by the anti-A antibody, but not the anti-B antibody, it means that the A antigen is present but not the B antigen. Therefore, the blood type is A.
Explanation: