阅读理解：certain animals and plants develop chara

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1、阅读理解：Certainanimalsandplantsdevelopchara　　AdaptationofLivingThings　　Certainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbetterthanothersoftheirkind.Thisnaturalbiologicalprocessiscalledadaptation.Amongthesuperiorcharacteristicsdevelopedthroughadaptationarethosethatma

2、yhelpingettingfoodorshelter，inprovidingprotection，andinproducingandprotectingtheyoung.Thatresultsintheevolutionofmoreandmoreorganismsthatarebetterfittedtotheirenvironments.　　Eachlivingthingisadaptedtoitswayoflifeinageneralway，buteachisadaptedespeciallytoitsowndistinctclass.Aplant，forexample，dep

3、endsuponitsrootstofixitselffirmlyandtoabsorbwaterandinorganicchemicals.Itdependsuponitsgreenleavesforusingthesun‘senergytomakefoodfrominorganicchemicals.Thesearegeneraladaptations，commontomostplants.Inaddition，therearespecialadaptationsthatonlycertainkindsofplantshave.　　Manyanimalshaveadaptatio

4、nsthathelpthemescapefromtheirenemies.Someinsectsarehiddenbytheirbodycolororshape，andmanylooklikealeaforalittlebranch.Thecoatsofdeerarecoloredtomixwiththesurroundings.Manyanimalshavetheabilitytoremaincompletelystillwhenanenemyisnear.　　Organismshaveagreatvarietyofwaysofadapting.Theymayadaptinthei

5、rstructure，function，andgenetics;intheirdevelopmentandproductionoftheyoung;andinotherrespects.Anorganismmaycreateitsownenvironment，asdowarm－bloodedmammals，whichhavetheabilitytoadjustbodyheatexactlytomaintaintheiridealtemperaturedespitechangingweather.Usuallyadaptationsareanadvantage，butsometimes

6、anorganismissowelladaptedtoaparticularenvironmentthatifconditionschange，itfindsitdifficultorimpossibletoreadapttothenewconditions.　　1.Someplantsandanimalsdevelopsuperiorcharacteristicssothattheymay　　A）helpothersoftheirkindgetfood，shelterandotherthingsneeded.　　B）surviveeveninextremelyseverecondi

7、tions.　　C）becomebetteradaptedtotheenvironmentsthanothersoftheirkind.　　D）resultintheevolutionandproductionofmoreintelligentorganisms.　　2.Inthefirstparagraph，thewordenvironmentscouldbestbereplacedby　　A）contexts.　　B）surroundings.　　C）