Horses Horses benefitted the Americas by serving as a mean of transportation.
Old to New-Diseases
Diseases Europeans gave Natives small pox,malaria, and yellow fever, this happened because of trade and domesticated animals.This only affected and killed Natives because their bodies weren't used these certain diseases while Europeans had years of experience and treatments for these diseases.
Old to New-Beleifs/Religion
European missionaries tried to convert Natives to Christianity and if Natives refused their hands and feet would be cut off no matter what age they were.
New to Old-Crops
Sugar Sugar serves as a source of income and changed eating habits of Europeans. This trade also lead to sugar trade or in other words, slavery.
New to Old-People
Old to New-Crops
Crops included squash, beans, tomatoes, peppers,peanuts, papayas, guavas, avocados, pineapples,corn,potatoes,cacao, ans tobacco because of their rich tropical soil.
People All of the expansion and slavery led to diverse societies.