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;40percentofthehoneybeesintheUShavedied.C)Honeybeesareleavingtheirhivesanddonotreturn.
D)Honeybeehivesareindisorder.
2.Whyareresearchersseriouslyconcernedwiththephenomenonofcolony-collapsedisorder
本篇论文出处 http://www.sxsky.net/xie/070560253.html
A)Becausehoneybeesproduceone-thirdofthefoodsweeat
B)Becausehoneybeesfeedonflowers.
C)Becausehoneybeeseatseedsofflowers.
D)BothBandC.
3.Whatarethepossiblecausesofcolony-collapsedisordergivenbythescientists
A)Worseningenvironment.
B)Diseaseandchemicals.
C)Dwindlingnumberofflowersaround.
D)Changesingenes'structures.
4.Accordingtothefifthparagraph,whichofthefollowingaboutbees'genesistrue
A)Bees'genesallowthemtoexpandtheircolonies.
B)Beesgeneshelpkeepthemintheirhives.
C)Beesgenesmakethemflyfromflowertoflower.
D)Beesgenescouldexplainthecollapseofsomecolonies.
5.WhatexplanationisgivenbyJerryHayestothephenomenon
A)Farmersapplycertainchemicalstokillunwantedbees.
B)Theinsecticidedestroysthehoneybee'snervoussystem.
C)Theinsecticideaffectsthehoneybee'smemory.
D)Alloftheabove.
答案与题解:
1.C短文第一段的第一句和最后一句告诉我们,昆虫学加家正面临一个不可解释的谜.第二句解释了这个谜,给出了答案.
2.A短文第二段的第一句提供了答案.蜜蜂传播花粉能使植物结果,因此为人类提供食物.
3.B第四的开头是Itcouldbethatdiseaseiscausingthedisappearanceofthebees.第五段的开头是Anothercauseofcolony-collapsedisordermaybecertainchemicalsthat等,这是科学家给出的两个可能造成这种现象的原因.
4.D第五段的句子:bees'genescouldexplainwhysomecolonieshavecollapsedandothershavenot.这是选择D的依据.选项A,B,C的内容文章中都没有出现,所以不是答案.
5.D第五段描述了另一个可能的原因,即,农夫使用的杀虫剂可能破坏了蜜蜂的神经系统和记忆.所以D是正确选择.
13.'Hidden'SpeciesMayBeSurprisinglyCommon(A级)
(替换2007年用书理工类阅读理解第四十八篇:ShrinkingWaterSupplyPosesThreattoPeace)
Crypticspecies–animalsthatappearidenticalbutaregeicallyquitedistant–maybemuchmorewidespreadthanpreviouslythought.Thefindingscouldhavemajorimplicationsinareasrangingfrombiodiversityestimatesandwildlifemanagement,toourunderstandingofinfectiousdiseasesandevolution.
ReportsofcrypticspecieshaveincreaseddramaticallyoverthepasttwodecadeswiththeadventofrelativelyinexpensiveDNAsequencingtechnology.MarkusPfenningerandKlausSchwenk,oftheGoethe-UniversitatinFrankfurt1,Germany,analyzedallknowndataoncrypticanimalspeciesanddiscoveredthattheyarefoundinequalproportionsthroughoutallmajorbranchesoftheanimalkingdomandoccurinequalnumbersinallbiogeographicalregions.
Scientistshadpreviouslyspeculatedthatcrypticspecieswerepredominantlyfoundininsectsandreptiles,andweremorelikelytooccurintropicalratherthantemperateregions."Speciesthatareseeminglywidespreadandabundantcouldinrealitybemanydifferentcrypticspeciesthathavelowpopulationsandarehighlyendangered,"saysPfenninger.Untilthegeicinformationofallspeciesinatleastonetaxonisthoroughlystudied,noonewillknowjusthowmanycrypticspeciesexist."Itcouldbeashighas30%,"Pfenningersays.
"I'mextremelysurprisedbytheirresults,"saysAlexSmithoftheUniversityofGuelph2inOntario3,Canada."It'sacalltoarmstokeepdoingthebroadkindofgeicstudiesthatwearedoing."
Samplingasmanyindividualsaspossible,scientistshopetopleteworkonallfishandbirdsinanother5to10years.Onceeitherofthesetaxonomicgroupsispleted,Pfenningersaysresearcherswillabletodecidehowmanycrypticspeciesexistthroughouttheanimalkingdom.
ExamplesofcrypticspeciesincludetheAfricanelephant.A2001studyfoundtheelephantswereactuallytwogeicallydistinct,non-interbreedingspecies,theAfricanbushelephantandtheAfricanelephant.Thespeciesarecurrentlylistedasvulnerableandthreatened,respectively,bytheWorldConservationUnion(WCU)4.
Thereclassificationsaremorethananacademicexercise.Theydefinepopulationsthathaveevolvedindependentlyofeachotherandwhosegeicdifferencescanhavesignificantconsequences.
Intheearly1900smisidentificationofmosquitospeciesbasedonmorphologyconfusedattemptstocontrolmalariainEurope.Ultimately,whatwasthoughttobeasinglespecieswasactuallymadeupofsixsiblingspecies,onlythreeofwhichtransmittedthedisease."Thebasicunitinbiologyisalwaysthespecies,andyouhavetoknowwhatyouaredealingwith,"Pfenningersays.Muchpreviousresearchisnownolongerused,hesays,becauseitisnotclearwhatspecieswasbeingstudied.(428words)
词汇:
cryptic/(kr((pt(k/adj.隐蔽的,隐藏的taxon/(t(ks(n/n.(生物的)分类单元biodiversity/(ba(((da((v((s(t(/n.生物多样性taxonomic/(t(ks((n(m(k/adj.分类(学)的DNA/(di(en(e(/n.脱氧核糖核酸non-interbreeding/(n(n(((nt((bri(d((/adj.非(deoxyribonucleicacid的缩写)杂交繁殖Biogeographical/(ba(((((d(i((((r(f(k(l/adj.生morphology/m(((f(l(d((/n.形态学物地理学的malaria/m((le(r((/n.疟疾reptile/(repta(l/n.爬行动物sibling/(s(bl((/n.同胞,同属temperate/(temp(r(t/adj.(气候)温带的
注释:
1.theGoethe-UniversitatinFrankfurt:德国法兰克福大学,即JohannWolfgangGoethe-UniversitatFrankfurtamMain,位于美因和莱茵两河汇流处的法兰克福.
2.theUniversityofGuelph:圭
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