Well, this is a broad question, so I'm not quite sure what answer you're looking for, but the simplest answer, which used to get me confused, is: the monomer is a repeat unit of the polymer. Let's start by analyzing the words monomer and polymer. Mono = one, and poly = many. Now, lets go back to the science.
History of the United States with 150+ answers. According to one source: Twelve American presidents owned slaves, eight while serving in office, and at least 25 presidents count slave owners among their ancestors.. http://www.slate.com/articles/li... However, to put this into perspective this would be 37 that were either slave owners themselves or descended from slave owner ancestors - or 84%.
Yet at the time these words were written, more than 500,000 black Americans were slaves. Jefferson himself owned more than 100. Slaves accounted for about one-fifth of the population in the American colonies. Most of them lived in the Southern colonies, where slaves made up 40 percent of the population. Many colonists, even slave holders, hated slavery. Jefferson called it a âhideous blotâ on America.