先有鸡还是先有蛋英语PPT.ppt

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1、Whichcomesfirst,chickenoregg?AnoldphilosophicalquestionAhottopicofdiscussionBiologicalevolutionlawAhistoricalstory诸葛亮周瑜Whichcomesfirst,chickenoregg?EggfirstIfthereisnochicken,thentheeggcomefrom?Ifthefirsteggishatchingegg(种蛋），wherethechickencomefrom?Sointheendwhichcomesfirst?Differentpeoplehavedi

2、fferentpointsofviewLet'stakealookatonlinevotingScientificdiscovery小型肉食恐龙蛋巢穴DinosaurnestlikebirdsnestsDinosaureggsaresimilartobirdeggsQuantityArrangementEachproducingtwoeggssimilartobirds恐龙蛋化石Archaeopteryx（始祖鸟）SimilartodinosaurSimilartobirdVariation(变异）eggLengthyprocessDirectlyIsthispossible?Afte

3、rscientificresearchthisisimpossible.Simplystated：VariationisNon-directional（不定向的）Conclusion：EggfirstDinosaurlayVariationeggthenthesevariationeggslowlyevolvedintochickenThankyou!!!