All of above choices are functions of antibodies
Answer:
In science, a variable is any item, factor, or condition that can be controlled or changed
C: from what I can see in the graph
Biological structures like DNA, proteins and cells all depend on molecules. ... Neurotransmitters like epinephrine are pretty simple molecules, but without them our nervous system couldn't work. Oxygen, containing just two oxygen atoms, is a very simple molecule, and it is certainly essential to living things.