A protein called GEF-H1 is known to control immune responses to certain viruses such as influenza A. GEF-H1 is best classified as which kind of protein?

a) a structural protein
b)an antibody
c)an enzyme
d)a messenger protein

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water