Which of these is a natural factor that affects the environment? domestication oxygen* research factories am i correct?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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 energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius