Students are testing the james river for dissolved-oxygen levels. They test in the blue ridge mountains, at the rivers source, and in Richmond Virginia, a highly populated area. What is the independent variable in this experiment?

Scientific method and data analysisa biology student wanted to determine if there is a relationship between resting heart rate and bodyheight. she gathered information from 12 classmates and constructed the table below.resting heart rate (beats per minute)student height (cm)155. 156156165180180190194195

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

Describe how a student should adjust the microscope to see the cells on a slide more clearly?