What makes a hot spring hot? A. Water is heated by hot rocks below the earths surface.

B. The sun heats the water and makes it hot.

C. Fire below the earths surface heats it.

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

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

Brendan made a diagram to compare and contrast the benefits of two types of social behavior. which description belongs in the area marked "z"? reproductionprotectionforaginghydrodynamic efficiency