Following the russian revolution, the soviet union adopted communism, a system a. was driven by consumer demand. b. gave people a vice in the government. c. controlled nearly all of the economic and political decisions. d. privatized industry.

Which of the following crops is not typically grown in the great plains region? a. corn c. soybeans b. rice d. wheat

Select the correct text in the passage. the moving continents affect all subsystems on earth. which sentence identifies a potentially negative consequence of shifting continents? the supercontinent pangaea began to break up about 175 million years ago. [during this process, more coastline was exposed as the landmasses separated]. [the rearrangement and displacement of these huge landmasses resulted in the diversity of plants and animals we see on earth today]. [the movement of the plates sometimes leads to earthquakes and tsunamis]. however, over the long course of earth's history, their effects are usually minimal. in oceans, the plate movements usually lead to seafloor spreading. [seafloor spreading often results in the formation of underwater ranges of mountains].

The organ that has two atria and one ventricle is the