The average score for the 5th-grade math test is 89.5. The top 5th graders took the test and scored 89, 93, 91, and 87. Are their scores accurate, precise, neither, or both?

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the supermassive black hole is in the middle of the galaxy.

"a.) well–developed vascular system."