In terms of ethnicity, both the united states and switzerland a) have no ethnic controversies. b) are made up of many ethnicities. c) are dominated by one major ethnic group. d) have limited the influence of ethnic groups.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Were the first to arrive in nowth america. asian french

How do oceanographers measure the salinity of ocean water?