作业帮Which comes first,chicken or egg?(proposition)
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Which comes first,chicken or egg?(proposition)
Which comes first,chicken or egg?(proposition)
Which comes first,chicken or egg?(proposition)
先有鸡蛋 英国诺丁汉大学的基因学家约翰·布鲁克菲尔德从基因进化的角度给出了自己的答案－－先有鸡蛋.约翰·布鲁克菲尔德解释说,由于基因在动物的一生中并不会发生变异,因此世界上第一只鸡最早应是以一个胚胎的形式出现在某种蛋体之中.布鲁克菲尔德教授认为：“第一只真正意义上的鸡应是形成于某只蛋之中.鸡蛋才是首先出现的.”他指出,在这只蛋的内部包含着与鸡完全相同的DNA结构.他的上述观点得当了伦敦国王大学教授大卫·帕宾尼奥的支持.帕宾尼奥表示：“第一只小鸡应来自某只蛋.而这只蛋则是另外一种禽类发生变异后的产物.这只蛋从本质上说无论如何都是一枚鸡蛋,因为从中孕育出的是一只真正的鸡.”
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