How was the american homefront affected by WW2

How did the incas unite the andes mountains?

Characteristics of what type of economic system are being described below? 1.economy in which some/all of the basic economic questions answered by central authority 2.trade generally limited to what is produced through the influence of the government a. command economies. b. market economies. c. traditional economies.

What from the columbian exchange had perhaps the biggest impact on the world?