变形这个现象,在生物界到处可以遇到,常见的例子如园丁经常把许多种花草按照自己的理想盘曲成各式各样美丽的盆景,也就是通过外力使柔嫩可塑的植物变了形,以供人们欣赏。又如有人在小树上系一条绳子晾衣服,日久天长小树长大,系绳处就出现了一个狭窄环,这也是一种变形。在动物中也有这种情况,例如过去法国人把小狗放在小篮子中喂养。则这狗永远长不大。人类也常利用这 The phenomenon of deformation can be encountered everywhere in the world of biology. Common examples include gardeners often arranging many kinds of flowers in accordance with their own ideals into a variety of beautiful bonsai, that is, by transforming the soft, For people to enjoy. Another example is someone in the small tree tied a rope to dry clothes, growing up trees, the tether appears a narrow ring, which is a deformation. In animals, this is also the case, for example, in the past, French people fed small dogs in small baskets. This dog will never grow up. Humans also often use this