Demand, how people spend money, and the government's fiscal policy all have a part in determining
a. embargoes.
b. price supports.
c. specialization.
d. the business cycle.

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Which of the following typically characterizes a tropical rainforests

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?