What negative impact did the Columbian exchange have on our biosphere?

Why is the federal reserve managed under the oversight of the federal government? the fed is responsible for printing and coining money.the fed is responsible for collecting income taxes.the fed is responsible for the government’s money.the fed is responsible for paying off government debt.(the first option isn't correct i tried that one)edit: the answer is the fed is responsible for the government’s money.

Quick pl which of the following historic indian cultures did hernando de soto come in contact with during his expedition? (choose all that apply) a. caddo b. quapaw c. kaw d. osage

Ihonestly don't know how to revise, like i'm struggling so much to remember things and i really don't know what to do at this rate. does anyone have any advice? especially with american history, i've got 5 topics in this section.