Exercise intensity of % is necessary for maintaining aerobic capacity

Types of scientific inquiry that biologist engage in that cannot be completely controlled

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

What is the identity of the planets?