The factor(s) that to perpetuate temperate grasslands, such as the american prairies, and prevent them from becoming woodlands include

What type of government does costa rica have?

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic