2015考研英语阅读进化和表皮色彩
<p> <span word="Evolution">Evolution</span> <span word="and">and</span> <span word="coat">coat</span> <span word="colour">colour</span></p><p> 进化和表皮色彩</p><p> <span word="Well">Well</span> <span word="spotted">spotted</span></p><p> 美丽涂鸦</p><p> <span word="The">The</span> <span word="reason">reason</span> <span word="why">why</span> <span word="some">some</span> <span word="cats">cats</span> <span word="are">are</span> <span word="plain">plain</span> <span word="and">and</span> <span word="others">others</span> <span word="arepatterned">arepatterned</span></p><p> 为何有些猫科动物全无斑纹，而其他的则斑斑点点?</p><p> <span word="How">How</span> <span word="the">the</span> <span word="leopard">leopard</span> <span word="got">got</span> <span word="his">his</span> <span word="spots">spots</span> <span word="is">is</span>, <span word="famously">famously</span>, <span word="the">the</span> <span word="subject">subject</span> <span word="of">of</span> <span word="one">one</span> <span word="of">of</span> <span word="Rudyard">Rudyard</span> <span word="Kipling">Kipling</span> <span word="s">s</span> <span word="Just">Just</span> <span word="SoStories">SoStories</span>.</p><p> 美洲豹为何满身斑点?这是吉卜林大作《原来如此》中的一个著名问题。</p><p> <span word="Kipling">Kipling</span> <span word="suggested">suggested</span> <span word="they">they</span> <span word="were">were</span> <span word="handprints">handprints</span> <span word="made">made</span> <span word="by">by</span> <span word="the">the</span> <span word="leopard">leopard</span> <span word="s">s</span> <span word="human">human</span> <span word="friend">friend</span>. <span word="More">More</span> <span word="plausibly">plausibly</span>,<span word="he">he</span> <span word="had">had</span> <span word="an">an</span> <span word="explanation">explanation</span> <span word="for">for</span> <span word="what">what</span> <span word="the">the</span> <span word="spots">spots</span> <span word="are">are</span> <span word="for">for</span>: <span word="to">to</span> <span word="break">break</span> <span word="up">up</span> <span word="the">the</span> <span word="animal">animal</span> <span word="s">s</span> <span word="shape">shape</span> <span word="when">when</span> <span word="it">it</span> <span word="ishiding">ishiding</span> <span word="in">in</span> <span word="the">the</span> <span word="dappled">dappled</span> <span word="light">light</span> <span word="of">of</span> <span word="the">the</span> <span word="forest">forest</span>.</p><p> 吉卜林认为，那是美洲豹的人类朋友们留下的手印。他更靠谱的解释是，当美洲豹藏身在树丛的斑驳光影之中，斑点有助于让它们隐去形迹。</p><p> <span word="These">These</span> <span word="days">days</span>, <span word="the">the</span> <span word="human">human</span>-<span word="handprinttheory">handprinttheory</span> <span word="of">of</span> <span word="the">the</span> <span word="leopard">leopard</span> <span word="s">s</span> <span word="spots">spots</span> <span word="has">has</span> <span word="fallen">fallen</span> <span word="out">out</span> <span word="of">of</span> <span word="favour">favour</span>.</p><p> 最近，美洲豹斑点的手印理论已不合口味。</p><p> <span word="Instead">Instead</span>, <span word="a">a</span> <span word="more">more</span> <span word="prosaic">prosaic</span> <span word="idea">idea</span> <span word="has">has</span> <span word="gained">gained</span> <span word="ground">ground</span>, <span word="based">based</span> <span word="on">on</span> <span word="what">what</span> <span word="is">is</span> <span word="known">known</span> <span word="asreaction">asreaction</span>-<span word="diffusion">diffusion</span> <span word="pattern">pattern</span> <span word="formation">formation</span>, <span word="in">in</span> <span word="which">which</span> <span word="chemicals">chemicals</span> <span word="that">that</span> <span word="trigger">trigger</span> <span word="the">the</span> <span word="differentiation">differentiation</span> <span word="ofcells">ofcells</span> <span word="in">in</span> <span word="an">an</span> <span word="embryo">embryo</span> <span word="interact">interact</span> <span word="with">with</span> <span word="one">one</span> <span word="another">another</span> <span word="to">to</span> <span word="produce">produce</span> <span word="patterns">patterns</span> <span word="that">that</span> <span word="are">are</span> <span word="then">then</span> <span word="reflected">reflected</span> <span word="inthe">inthe</span> <span word="fates">fates</span> <span word="of">of</span> <span word="nearby">nearby</span> <span word="cells">cells</span>.</p>
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