is energy that uniformly fills the entire universe. A) Cosmic force field
B) Cosmic background radiation
C) X-ray radiation
D) Light energy

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

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 problem in this article? what solution does the article propose?