The Appilachian mountains was the greatest barrier, because it was crawling with Indian's that may have made them turn back.
Answer:
This type of ecosystem has different plants such as grasses, juncales, grasses or grass constitute the dominant vegetation. Although in the grasslands of the temperate regions and there may be more than 50 species of vascular plants and in the tropical grasslands more than 200, in general, two or three species of grasses are those that dominate more than 60% of the biomass of the land; Here live large herbivores and birds, in addition to a large amount of flora.
Prairie fauna plays a fundamental role in preserving the natural balance, essential for the food chain. Numerous species of animals excavating the prairies, by removing the soil, modify the mineral postresal content of this and enable the growth of plant species. Under the earth, worms and other invertebrates act that also oxygenate the soil, along with millions of bacteria that break down organic waste.
Explanation:
Fiscal policy allows the government to adjust taxes and government spending during times of recession and in times when the economy is doing really well. During a recession the government will often lower taxes and interest rates and increase government spending in order to boost the economy.
The Supreme Court decided "separate but equal" ( i.e.segregation) was constitutional under the Fourteenth Amendment, as long as the facilities or accommodations were equal.
