Plz and thank you, The diagram below shows the layers of a rock having an ammonite: Which statement about the rock fossils is true?

a. Fossil Y is older than fossil X.
b. Fossil Z is younger than fossil Y.
c. fossil Z existed over many periods of time.
d. Fossil Y existed during the same period as the ammonite.

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology

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.

All phases of matter may have a fixed mass