职称英语考试理工类的AB级阅读理解精讲(3)
<p> <span word="Hidden">Hidden</span> <span word="Species">Species</span> <span word="May">May</span> <span word="Be">Be</span> <span word="Surprisingly">Surprisingly</span> <span word="Common">Common</span> <span word="Cryptic">Cryptic</span> <span word="species">species</span> <span word="animals">animals</span> <span word="that">that</span> <span word="appear">appear</span> <span word="identical">identical</span> <span word="but">but</span> <span word="are">are</span> <span word="genetically">genetically</span> <span word="quite">quite</span> <span word="distant">distant</span>一<span word="may">may</span> <span word="be">be</span> <span word="much">much</span> <span word="more">more</span> <span word="widespread">widespread</span> <span word="than">than</span> <span word="previously">previously</span> <span word="thought">thought</span>. <span word="The">The</span> <span word="findings">findings</span> <span word="could">could</span> <span word="have">have</span> <span word="major">major</span> <span word="implications">implications</span> <span word="in">in</span> <span word="areas">areas</span> <span word="ranging">ranging</span> <span word="from">from</span> <span word="biodiversity">biodiversity</span> <span word="estimates">estimates</span> <span word="and">and</span> <span word="wildlife">wildlife</span> <span word="management">management</span>，<span word="to">to</span> <span word="our">our</span> <span word="understanding">understanding</span> <span word="of">of</span> <span word="infectious">infectious</span> <span word="diseases">diseases</span> <span word="and">and</span> <span word="evolution">evolution</span>. <span word="Scientists">Scientists</span> <span word="had">had</span> <span word="previously">previously</span> <span word="speculated">speculated</span> <span word="that">that</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="were">were</span> <span word="predominantly">predominantly</span> <span word="found">found</span> <span word="in">in</span> <span word="insects">insects</span> <span word="and">and</span> <span word="reptiles">reptiles</span>，<span word="and">and</span> <span word="were">were</span> <span word="more">more</span> <span word="likely">likely</span> <span word="to">to</span> <span word="occur">occur</span> <span word="in">in</span> <span word="tropical">tropical</span> <span word="rather">rather</span> <span word="than">than</span> <span word="temperate">temperate</span> <span word="regions">regions</span>. <span word="Species">Species</span> <span word="that">that</span> <span word="are">are</span> <span word="seemingly">seemingly</span> <span word="widespread">widespread</span> <span word="and">and</span> <span word="abundant">abundant</span> <span word="could">could</span> <span word="in">in</span> <span word="reality">reality</span> <span word="he">he</span> <span word="many">many</span> <span word="different">different</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="that">that</span> <span word="have">have</span> <span word="low">low</span> <span word="populations">populations</span> <span word="and">and</span> <span word="are">are</span> <span word="highly">highly</span> <span word="endangered">endangered</span>, <span word="says">says</span> <span word="Henninger">Henninger</span>. <span word="Until">Until</span> <span word="the">the</span> <span word="genetic">genetic</span> <span word="information">information</span> <span word="of">of</span> <span word="all">all</span> <span word="species">species</span>. <span word="in">in</span> <span word="at">at</span> <span word="least">least</span> <span word="one">one</span> <span word="texon">texon</span> <span word="is">is</span> <span word="thoroughly">thoroughly</span> <span word="studied">studied</span>, <span word="no">no</span> <span word="one">one</span> <span word="will">will</span> <span word="know">know</span> <span word="just">just</span> <span word="how">how</span> <span word="many">many</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="exist">exist</span>. <span word="It">It</span> <span word="could">could</span> <span word="be">be</span> <span word="as">as</span> <span word="high">high</span>. <span word="as">as</span> 30%，<span word="Pfenninger">Pfenninger</span> <span word="says">says</span> <span word="Sampling">Sampling</span> <span word="as">as</span> <span word="many">many</span> <span word="individuals">individuals</span> <span word="as">as</span> <span word="possible">possible</span>, <span word="scientists">scientists</span> <span word="hope">hope</span> <span word="to">to</span> <span word="complete">complete</span> <span word="work">work</span> <span word="on">on</span> <span word="all">all</span> <span word="fish">fish</span> <span word="and">and</span> <span word="birds">birds</span> <span word="in">in</span> <span word="another">another</span> 5 <span word="to">to</span> 10 <span word="years">years</span>. <span word="Once">Once</span> <span word="either">either</span> <span word="of">of</span> <span word="these">these</span> <span word="taxonumic">taxonumic</span> <span word="groups">groups</span> <span word="is">is</span> <span word="completed">completed</span>. <span word="Pfenninger">Pfenninger</span> <span word="says">says</span> <span word="researchers">researchers</span> <span word="will">will</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="decide">decide</span> <span word="how">how</span> <span word="many">many</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="exist">exist</span> <span word="throughout">throughout</span> <span word="the">the</span> <span word="animal">animal</span> <span word="kingdom">kingdom</span>. <span word="The">The</span> <span word="reclassifications">reclassifications</span> <span word="are">are</span> <span word="more">more</span> <span word="than">than</span> <span word="an">an</span> <span word="academic">academic</span> <span word="exercise">exercise</span>: <span word="They">They</span> <span word="define">define</span> <span word="populations">populations</span> <span word="that">that</span> <span word="have">have</span> <span word="evolved">evolved</span> <span word="independently">independently</span> <span word="of">of</span> <span word="each">each</span> <span word="other">other</span> <span word="and">and</span> <span word="whom">whom</span> <span word="genetic">genetic</span> <span word="differences">differences</span> <span word="that">that</span> <span word="have">have</span> <span word="evolved">evolved</span> <span word="independently">independently</span> <span word="of">of</span> <span word="each">each</span> <span word="other">other</span> <span word="and">and</span> <span word="whose">whose</span> <span word="genetic">genetic</span> <span word="differences">differences</span> <span word="can">can</span> <span word="have">have</span> <span word="significant">significant</span> <span word="consequences">consequences</span>. 1，<span word="Which">Which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="about">about</span> <span word="the">the</span> <span word="significance">significance</span> <span word="of">of</span> <span word="the">the</span> <span word="research">research</span> <span word="on">on</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="is">is</span> <span word="NOT">NOT</span> <span word="true">true</span>? <span word="B">B</span> <span word="The">The</span> <span word="results">results</span> <span word="of">of</span> <span word="the">the</span> <span word="research">research</span> <span word="can">can</span> <span word="help">help</span> <span word="the">the</span> <span word="development">development</span> <span word="of">of</span> <span word="biodiversity">biodiversity</span> <span word="estimates">estimates</span>. <span word="D">D</span>. <span word="The">The</span> <span word="results">results</span> <span word="of">of</span> <span word="the">the</span> <span word="research">research</span> <span word="can">can</span> <span word="help">help</span> <span word="our">our</span> <span word="understanding">understanding</span> <span word="of">of</span> <span word="survival">survival</span> <span word="of">of</span> <span word="the">the</span> <span word="fittest">fittest</span>. <span word="A">A</span> <span word="They">They</span> <span word="occurred">occurred</span> <span word="in">in</span> <span word="equal">equal</span> <span word="numbers">numbers</span> <span word="in">in</span> <span word="all">all</span> <span word="biogeographical">biogeographical</span> <span word="regions">regions</span> <span word="C">C</span> <span word="They">They</span> <span word="were">were</span> <span word="likely">likely</span> <span word="to">to</span> <span word="be">be</span> <span word="in">in</span> <span word="tropical">tropical</span> <span word="rather">rather</span> <span word="than">than</span> <span word="temperate">temperate</span> <span word="regions">regions</span> 3, <span word="Do">Do</span> <span word="scientists">scientists</span> <span word="know">know</span> <span word="how">how</span> <span word="many">many</span> <span word="cryptic">cryptic</span> <span word="species">species</span> <span word="exist">exist</span>? <span word="B">B</span> <span word="Yes">Yes</span>. <span word="they">they</span> <span word="do">do</span>. <span word="D">D</span> <span word="They">They</span> <span word="will">will</span> <span word="never">never</span> <span word="know">know</span> <span word="the">the</span> <span word="answer">answer</span>. <span word="A">A</span> <span word="The">The</span> <span word="WCU">WCU</span> <span word="are">are</span> <span word="interbreeding">interbreeding</span> <span word="those">those</span> <span word="elephants">elephants</span> <span word="C">C</span> <span word="They">They</span> <span word="are">are</span> <span word="two">two</span> <span word="genetically">genetically</span> <span word="distant">distant</span> <span word="species">species</span>.</p>
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