为什么动物的体型大小悬殊:大至几十吨重的蓝鲸,小到肉眼刚能看见的草履虫?为什么动物的产仔数量多少迥异:有一次产卵数十万的鱼类,也有一胎一仔的兽类?为什么动物的寿命长短不一:蜉蝣朝生夕死,而龟类却长命百岁?为什么人类的敌害蚊、蝇、老鼠屡灭不绝?为什么珍贵稀有的动物却日益稀少乃至濒临灭绝?原来,大自然生存的物种,都有一 Why the size of the animal body size disparity: As many dozens of tons of blue whales, as small as the naked eye can be seen paramecium? Why the number of animals littermates very different: There are a few hundred thousand spawning fish, but also a child Why do animals have different lengths of life: 蜉 蝣 Ascension and death, but the turtles are longevity? Why does human predators mosquitoes, flies, mice disappear? Why is rare and precious animals are increasingly Sparse or even near extinction? It turned out that the species of nature, there is one