Which planets have evidence of water on the surface? Select two options.

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 most important inorganic material for livings things? ! due tomorrow!

What are the three groups of atoms that make up amino acids called