Which number represents an acidic ph, 4 or 9? numerical answers expected!

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.

Adistinctive characteristic of mammals that is not observed in other vertebrates is

Produce proteins by following coded instructions that come from the nucleus of the cell.