Corn became so dissimilar to its ancestor , teosinte , that its origin was commonly disputed until very recently [ see illustration above ] 玉米和其祖先大刍草的外观大相迳庭，直到最近，有关它们的起源的争议才平息（见上图） 。
2.
Wild cotton for instance creeps past the florida keys across the gulf of mexico and into mexico . in south america a weedy corn relative teosinte dresses the edges of domesticated cornfields 举例来说，野生棉花已经蔓延过弗罗里达群岛，横越墨西哥湾进入墨西哥在南美洲的玉米田周围，长着它们的野生亲戚，蜀黍。
