The radial immunodiffusion test quantifies antigen by mixing into a gel and then allowing antigen to diffuse out from a well cut in the gel.

vascular tissue transports materials from the environment into the plant.

not sure if this what   you'r looking for would be percent composition

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

69 is the correct math for the amino acids