PH meter, which is a device used to measure hydrogen-ion activity in the solution. A PH meter is a voltmeter stuck to a pH electrode and a reference electrode. -maclittleseed
D. Growth, Metabolism, and Differentiation.
I would say b, that would only make sense to me cause it couldn’t be your stomach or skeletal
Because cells are in ever living thing
The density of salt water is greater than the density of fresh water