Using a substance's rate of decay to determine its age is an example of A relative dating using index fossils C chemical engineering D absolute dating

24. how are vaccines used to keep people healthy?

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.

The effect of a hormone on a target cell may be decreased by the presence of