Why is it impossible to use biological characteristics to sort people into consistent races?

People cannot be reliably divided into racial groups. There are no relationships between traits that are used to categorize people into races (like skin color) and associated stereotypes. Over time, geography and environment influence the genetic structures of human populations through natural selectionhope it helpeed

answer; analytical,creative and practical;

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.