Erosion occurs when natural forces alter a landscape. what does it mean to alter a landscape?

Which plant has a visible leaf modification that will it conserve water in extremely dry environments?

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

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16