What impact did the new world have on the old world?

the old world had nothing on it it was full of plant and animals,but the new world was full with people and some animals

The impact of New World plants on old world agriculture was remarkably significant. Plants such as potatoes, tomatoes, and beans revolutionise the agricultural progress of the Old world. Furthermore, the New World diseases such as syphilis also spread throughout the Old World, causing much havoc.