Evolutionary process whereby one species evolves into another without any splitting into multiple species Punctuated Equilibrium Model of the rate of evolution in which there are long periods of little change (stasis) in the species punctuated by short bursts of rapid change (usually due to an environmental change) Extinction. Rapid disappearance of a species.
17th Amendment to the U.S. Constitution: Direct Election of U.S. Senators. Americans did not directly vote for senators for the first 125 years of the Federal Government. The Constitution, as it was adopted in 1788, stated that senators would be elected by state legislatures.
Prior to the 17th Amendment, the Constitution specified that senators were elected by state legislatures. The reason why the Framers of the Constitution originally did this was because they wanted state governments to have some kind of role in the national government.urthermore, sometimes state legislatures just couldn't decide who should be senator. Consequently, the Constitution was changed with the 17th Amendment so that the Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years...