The Pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continent, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during the Early Modern period.
While the phrase "pre-Columbian era" literally refers only to the time preceding Christopher Columbus's voyages of 1492, in practice the phrase is usually used to denote the entire history of indigenous Americas cultures until those cultures were exterminated, diminished, or extensively altered by Europeans, even if this happened decades or centuries after Columbus's first landing. For this reason the alternative terms of Precontact Americas, Pre-Colonial Americas or Prehistoric Americas are also in use. In areas of Latin America the term usually used is Pre-Hispanic.
They are used as radio waves, infrared radiation, visible light.
Decomposers are necessary to the food chain because they break down the results of the food chain into the basic elements that producers can then use to begin the process over again. Decomposers include groups of bacteria that help to speed up the decaying process of dead plants and animals.
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Answer:
To address the problems of interstate trade barriers and the ability to enter into trade agreements, it included the Commerce Clause, which grants Congress the power "to regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes." Moving the power to regulate interstate commerce toCongress would enable the creation of a free trade zone among the several states; removing the power to regulate international trade from the states would enable the president to negotiate, and Congress to approve, treaties to open foreign markets to American-made goods. The international commerce power also gave Congress the power to abolish the slave trade with other nations, which it did effective on January 1, 1808, the very earliest date allowed by the Constitution.
Explanation:
It is B pair the last one
