Culture meeting and the columbian exchange

Question1: Describe Native American society or societies around the time of first contact with Europeans. (A way to thinking about answering this question is to think about the following: Were Native Americans a homogeneous group that would have viewed themselves as part of one large group inhabiting the Americas? What generalizations can be made about Native American societies?)
Question 2: What were the unintended consequences of the exchange of plants, pests, and diseases between the Eastern hemisphere (Old World) and the Western hemisphere (New World)?
https://sway.office.com/kRfPxqAStfbEfLIi?ref=Link
http://www.americanyawp.com/