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 to the United States Constitution in  1913 a Senator was elected by their home state's house of  representatives.The 17th Amendment changed this â¦ process making  Senators directly electable by the people.hare to: Before the 17th Amendment, members of the House of Representatives were elected directly by the people, but members of the Senate were elected by the individual states' legisl â¦ atures. However, the 17th Amendment changed the election of Senators from the state legislatures to the people.