Classifying by using flower color, leaf shape, and leaf arrangement are examples of a(n) artificial or natural system of classification.

Are the earth's ocean floor and continents the same age geologically? why or why not?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.