The Columbian Exchange introduced new plants, animals, and microbes to people on both sides of the ...

Answer: Europeans introduced grains, including wheat and rye and fruit (for example, peaches and citrus) that became part of native people's diets. They also brought with them cattle and hogs that provided new sources of meat, but whose eating habits proved detrimental to native grasses. Worse, Europeans carried with them diseases for which native people lacked immunity. Europeans brought back to Europe a few animals, such as turkeys and guinea pigs. More importantly, they began to grow maize and potatoes, crops that did very well in the European climate.