题目选项分析

People all over the world cultivate plants for food and for sale, but a surprising consequence of selective breeding has been the alteration of fruits and vegetables, and, after many generations, they are changed significantly in taste and appearance.

People all over the world cultivate plants for food and for sale, but a surprising consequence of selective breeding has been the alteration of fruits and vegetables, and, after many generations, they are changed significantly in taste and appearance.