<span>Archaea are thought to have diverged from some ancient group of _______ bacteria<span><span><span> </span> gram-positive</span></span></span>
A. Community.
This is because a community contains living this, and biotic means living.
Antibodies bind to the antigens on the surface of disease agents. If some sort of fluorescent tag is added to the antibody it would make the disease agent be identifiable either under a microscope or with other Instruments because it would bind to the antigens on the surface of the disease agents and make them glow a certain color. I hope that this is the answer that you were looking for and it has helped you.
