Final answer:
The fruit known as "wolf peach" and once thought to be poisonous is the tomato. This misconception was due to tomatoes being part of the nightshade family. In the Columbian Exchange, maize was the plant introduced to the Eastern Hemisphere, not tomatoes or apples.
Step-by-step explanation:
The fruit known as "wolf peach," which was erroneously thought to be poisonous, is the tomato. In the past, some Europeans believed tomatoes were toxic because they are a member of the nightshade family, which contains several poisonous species. However, this belief was incorrect, and tomatoes are indeed edible and widely consumed today.
Additionally, the tomato is related to the question about which plant was introduced to the Eastern Hemisphere in the Columbian Exchange. While apples are an old world fruit, it was maize (b), also known as corn, that was introduced from the Americas to the rest of the world during this time. Maize has since become a staple food in many countries around the globe.