plants are flowering faster than scientists predicted阅读理解答案

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1、Plantsarefloweringfasterthanscientistspredicted阅读理解答案　　Plantsarefloweringfasterthanscientistspredicted(预测)inreactiontoclimatechange,whichcouldhavelongdamagingeffectsonfoodchainsandecosystems.　　Globalwarmingishavingagreateffectonhundredsofplantandanimalspeciesaroundtheworld,changingsomelivingpatter

2、ns,scientistssay.　　Increasedcarbondioxide(CO2)intheairfromburningcoalandoilcanhaveaneffectonhowplantsproduceoxygen,whilehighertemperaturesandchangeablerainfallpatternscanchangetheirpatternsofgrowth.　　“Predictingspecies’reactiontoclimatechangeisamajorchallengeinecology,”saidtheresearchersofseveralU

3、.S.universities.Theysaidplantshadbeenthekeyobjectofstudybecausetheirreactiontoclimatechangecouldhaveaneffectonfoodchainsandecosystemservices.　　Thestudy,publishedontheNaturewebsite,usesthefindingsfromplantlifecyclestudiesandexperimentsacrossfourcontinentsand1,634species.Itfoundthatsomeexperimentsha

4、dunderestimated(低估)thespeedoffloweringtimesandleafingby4times.　　“Acrossallspecies,theexperimentsunder-predictedthespeedoftheadvance---forbothleafingandflowering---thatresultsfromtemperatureincreases,”thestudysaid.　　Thedesignoffutureexperimentsmayneedtobeimprovedtobetterpredicthowplatswillreacttocl

5、imatechange,itsaid.　　PlantsarenecessaryforlifeontheEarth.Theyarethebaseofthefoodchain,usingphotosynthesis(光合作用)toproducesugarfromcarbondioxideandwater.Theyletoutoxygenwhichisneededbynearlyeveryorganismontheplanet.　　Scientistsbelievetheworld’saveragetemperaturehasrisenbyabout℃since1900,andnearly℃ev

6、erytenyearssince1979.　　Sofar,effortstocutemissions(排放)ofplanet-warminggreenhousegasesarenotseenasenoughtopreventtheEarthheatingupbeyond2℃thiscentury---apointscientistssaywillbringthedangerofachangeableclimateinwhichweatherextremesarecommon,leadingtodrought,floods,cropfailuresandrisingsealevels.　　3

7、3.WhatisthekeyinformationtheauthorwantstogiveinParagraph1?　　A.Plants’reactiontoweathercouldhavedamagingeffectsonecosystems.　　B.Theincreasingspeedoffloweringisbeyondscientists’expectation.　　C.Climatechangeleadstot