gre考试阅读真题解析(B)
<p> <span word="A">A</span> <span word="special">special</span> <span word="mucous">mucous</span> <span word="coating">coating</span> <span word="that">that</span> <span word="serves">serves</span> <span word="as">as</span> <span word="a">a</span> <span word="chemical">chemical</span> <span word="camouflage">camouflage</span> <span word="allows">allows</span> <span word="clown">clown</span> <span word="fish">fish</span> <span word="to">to</span> <span word="live">live</span> <span word="among">among</span> <span word="the">the</span> <span word="deadly">deadly</span> <span word="tentacles">tentacles</span> <span word="of">of</span> <span word="the">the</span> <span word="unsuspecting">unsuspecting</span> <span word="sea">sea</span> <span word="anemone">anemone</span> <span word="whose">whose</span> <span word="form">form</span>, <span word="bright">bright</span> <span word="and">and</span> <span word="varied">varied</span> <span word="colors">colors</span>, <span word="and">and</span> <span word="cluster">cluster</span> <span word="of">of</span> <span word="tentacles">tentacles</span> <span word="superficially">superficially</span> <span word="resemble">resemble</span> <span word="a">a</span> <span word="flower">flower</span>). <span word="Utterly">Utterly</span> <span word="dependent">dependent</span> <span word="on">on</span> <span word="this">this</span> <span word="unlikely">unlikely</span> <span word="host">host</span> <span word="for">for</span> <span word="protection">protection</span> <span word="from">from</span> <span word="predators">predators</span>, <span word="clown">clown</span> <span word="fish">fish</span> <span word="have">have</span> <span word="evolved">evolved</span> <span word="in">in</span> <span word="isolated">isolated</span> <span word="communities">communities</span>, <span word="a">a</span> <span word="pattern">pattern</span> <span word="that">that</span> <span word="has">has</span> <span word="led">led</span> <span word="to">to</span> <span word="unusual">unusual</span> <span word="behavioral">behavioral</span> <span word="adaptations">adaptations</span>.</p><p> <span word="The">The</span> <span word="rigidly">rigidly</span> <span word="defined">defined</span> <span word="hierarchy">hierarchy</span> <span word="of">of</span> <span word="each">each</span> <span word="clown">clown</span>-<span word="fish">fish</span> <span word="community">community</span> <span word="is">is</span> <span word="dominated">dominated</span> <span word="by">by</span> <span word="a">a</span> <span word="monogamous">monogamous</span> <span word="breeding">breeding</span> <span word="pair">pair</span> <span word="consisting">consisting</span> <span word="of">of</span> <span word="the">the</span> <span word="largest">largest</span> <span word="fish">fish</span>, <span word="a">a</span> <span word="female">female</span>, <span word="and">and</span> <span word="the">the</span> <span word="next">next</span> <span word="largest">largest</span>, <span word="a">a</span> <span word="male">male</span>, <span word="attended">attended</span> <span word="by">by</span> <span word="a">a</span> <span word="fixed">fixed</span> <span word="number">number</span> <span word="of">of</span> <span word="sexually">sexually</span> <span word="immature">immature</span> <span word="fish">fish</span> <span word="ranging">ranging</span> <span word="in">in</span> <span word="size">size</span> <span word="from">from</span> <span word="large">large</span> <span word="to">to</span> <span word="tiny">tiny</span>. <span word="A">A</span> <span word="remarkable">remarkable</span> <span word="adaptation">adaptation</span> <span word="is">is</span> <span word="that">that</span> <span word="the">the</span> <span word="development">development</span> <span word="of">of</span> <span word="these">these</span> <span word="juveniles">juveniles</span> <span word="is">is</span> <span word="somehow">somehow</span> <span word="arrested">arrested</span> <span word="until">until</span> <span word="the">the</span> <span word="hierarchy">hierarchy</span> <span word="changes">changes</span>; <span word="then">then</span> <span word="they">they</span> <span word="grow">grow</span> <span word="in">in</span> <span word="lockstep">lockstep</span> , <span word="maintaining">maintaining</span> <span word="their">their</span> <span word="relative">relative</span> <span word="sizes">sizes</span>. <span word="While">While</span> <span word="the">the</span> <span word="community">community</span> <span word="thus">thus</span> <span word="economizes">economizes</span> <span word="on">on</span> <span word="limited">limited</span> <span word="space">space</span> <span word="and">and</span> <span word="food">food</span> <span word="resources">resources</span>, <span word="life">life</span> <span word="is">is</span> <span word="risky">risky</span> <span word="for">for</span> <span word="newly">newly</span> <span word="spawned">spawned</span> <span word="clown">clown</span> <span word="fish">fish</span>. <span word="On">On</span> <span word="hatching">hatching</span>, <span word="the">the</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="larvae">larvae</span> <span word="drift">drift</span> <span word="off">off</span> <span word="into">into</span> <span word="the">the</span> <span word="plankton">plankton</span>. <span word="If">If</span>, <span word="within">within</span> <span word="three">three</span> <span word="weeks">weeks</span>, <span word="the">the</span> <span word="defenseless">defenseless</span> <span word="larval">larval</span> <span word="clown">clown</span> <span word="fish">fish</span> <span word="locates">locates</span> <span word="a">a</span> <span word="suitable">suitable</span> <span word="anemone">anemone</span> , <span word="it">it</span> <span word="may">may</span> <span word="survive">survive</span>. <span word="However">However</span>, <span word="if">if</span> <span word="an">an</span> <span word="anemone">anemone</span> <span word="is">is</span> <span word="fully">fully</span> <span word="occupied">occupied</span>, <span word="the">the</span> <span word="resident">resident</span> <span word="clown">clown</span> <span word="fish">fish</span> <span word="will">will</span> <span word="repel">repel</span> <span word="any">any</span> <span word="newcomer">newcomer</span>.</p><p> <span word="Though">Though</span> <span word="advantageous">advantageous</span> <span word="for">for</span> <span word="established">established</span> <span word="community">community</span> <span word="members">members</span>, <span word="the">the</span> <span word="suspended">suspended</span> <span word="and">and</span> <span word="staggered">staggered</span> <span word="maturation">maturation</span> <span word="of">of</span> <span word="juveniles">juveniles</span> <span word="might">might</span> <span word="seem">seem</span> <span word="to">to</span> <span word="pose">pose</span> <span word="a">a</span> <span word="danger">danger</span> <span word="to">to</span> <span word="the">the</span> <span word="continuity">continuity</span> <span word="of">of</span> <span word="the">the</span> <span word="community">community</span>: <span word="there">there</span> <span word="is">is</span> <span word="only">only</span> <span word="one">one</span> <span word="successor">successor</span> <span word="for">for</span> <span word="two">two</span> <span word="breeding">breeding</span> <span word="fish">fish</span>. <span word="Should">Should</span> <span word="one">one</span> <span word="of">of</span> <span word="a">a</span> <span word="pair">pair</span> <span word="die">die</span>, <span word="the">the</span> <span word="remaining">remaining</span> <span word="fish">fish</span> <span word="cannot">cannot</span> <span word="swim">swim</span> <span word="off">off</span> <span word="in">in</span> <span word="search">search</span> <span word="of">of</span> <span word="a">a</span> <span word="mate">mate</span>, <span word="nor">nor</span> <span word="is">is</span> <span word="one">one</span> <span word="likely">likely</span> <span word="to">to</span> <span word="arrive">arrive</span>. <span word="It">It</span> <span word="would">would</span> <span word="seem">seem</span> <span word="inevitable">inevitable</span> <span word="that">that</span> <span word="reproduction">reproduction</span> <span word="must">must</span> <span word="sometimes">sometimes</span> <span word="have">have</span> <span word="to">to</span> <span word="halt">halt</span>, <span word="pending">pending</span> <span word="the">the</span> <span word="chance">chance</span> <span word="arrival">arrival</span> <span word="and">and</span> <span word="maturation">maturation</span> <span word="of">of</span> <span word="a">a</span> <span word="larval">larval</span> <span word="fish">fish</span> <span word="of">of</span> <span word="the">the</span> <span word="appropriate">appropriate</span> <span word="sex">sex</span>.</p>
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