Nature has ways of keeping the nitrogen carbon and phosphorus cycles in balance however run off from animal operations and fertilizer in our waterways can result in . a. cultural eutrophication
b. erosion
c. cleaner drinking water
d. an increase in water temperatures

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes