Are most bacteria harmful (pathogenic)? give examples of good bacteria.

Two critical interventions to turn around the opioid crises are:

What is the term for a water wave that is created by an underwater earthquake?

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.