第1題Theaverageplantcellhasadiameterof?A1—2μm

B3—4μm

C1—1μm

D10—100μm第2題Whichsubstancemakesupthehighestpercentageofthechemicalcompositionofabiofilm?A

Protein

BLipid

CSugarD

Starch第1題Thewaterpotentialgradientdeterminesthelawofthedirectionofwaterflow:ifsolutionconcentrationishigh,thewaterpotentialwouldbe();iflowconcentration,thewaterpotentialwouldbe().Wateralwaysinfiltratesfromhighwaterpotentialtolowwaterpotential.Alow；highBhigh;low

Chigh;high

D

low;low第2題

Intallwoodyplants,thewaterpotentialatthetopofthetreeis()thanthatoftherootsystem.Ahigherthan

Blowerthan

Cequalto

D

/第3題Plantcellscontainalargeamountofwater,generallyaccountingfor(

)oftheweightoftheprotoplasm.A50%～60%

B60%～70%

C70%～80%

D70%～90%Rationalirrigation第1題Mostplantstomataopendayandclosenightduetochangesin(

)inthestomataldefensecells.AA.waterpotential

BB.temperature

CC.light

DD.oxygencontent第2題Duringthenormalgrowingphaseofplants,(

)isthemainwayforplantstoabsorbwater,especiallyfortalltrees.AA.passivewaterabsorption

BB.activewaterabsorptionCC.rootpressure

D

D.transpirationChloroplastsandphotosyntheticpigmentsofplants第1題

Theabsorptionspectrumofcarotenoidsisdifferentfromthatofchlorophyll,anditsmaximumabsorptionpeakisin().AA.bluelightarea

BB.redlightarea

C

C.blue-purplelightarea

D

D.greenlightarea第2題

()isthemostimportantfactoraffectingchlorophyllformation?AA.Temperature

B

B.Light

CC.Moisture

DD.Nutritionelements第3題3、ChlorophyllAisgenerally(

)color.AgreenBblue-green

Cyellow-greenDgreen-yellowInfluencefactorsofphotosynthesis第1題TheCO2compensationpointforphotosynthesisintheleavesofC3plantsis(

)thatforphotosynthesisintheleavesofC4plants.Alowerthan

Bhigherthan

Cequalto

D/第2題1.Generallyspeaking,thelightcompensationpointandlightsaturationpointofherbaceousplantsare(

)thoseofwoodyplants.Alowerthan

Bhigherthan

Cequalto

D/Respirationandagriculturalproduction第1題

Respirationalsohasalottodowithfruitandvegetablestorage.Unlikegrainstorage,forfruitandvegetablestorage,wecannotreducemoistureorleavethemdried,becausedryingwillcauseshrinkage,lossoffreshstate,andincreasedrespiration.However,storagebyreducingtheoxygenconcentrationortemperatureandincreasing(

)concentrationisappropriate.AA.carbondioxide

B

B.carbonmonoxide

C

C.helium

DD.nitrogen第2題Undernaturalconditions,temperatureduringdayis(

),temperatureduringnightis(),whichreducetheconsumptionoforganicmatteratnight,andisconducivetotheaccumulationoforganicmatter,soXinjiangfruitslikemelonsandgrapesareparticularlysweet.

AA.high;low

BB.low;hight

C

C.high;high

DD.low;lowPlantlifecycle第1題2.Inagriculturalproduction,inordertoobtainahighyieldofspinach,more(

)fertilizershouldgenerallybeapplied.AA.phosphatic

BB.potash

C

C.nitrogen

DD.compound第2題1.Organssuchasroots,stems,leaves,seedsandfruits,aswellasthewholeplantofanannualplant,exhibit(

)growthratesduringgrowth.AA.“slow-fast-slow”

BB.“fast-slow-fast”

C

C.“slow-slow-fast”

DD.“fast-fast-slow”Photoperiodphenomenon第1題Scientistshavefoundthatfloweringisrelatedto(

),observingthatAmericantobaccocanflowerandbearfruitnormallyinFlorida,butdoesnotflowerandbearfruitevenwhenitgrowsto3to5metershighundernaturalconditionsinthesuburbsofWashington.AA.sunshineduration

BB.sunshineintensity

CC.moisturecontent

DD.temperaturecondition第2題Thedeterminingroleinthephotoperiodininducingfloweringinplantsis().AA.sunshineduration

BB.durationofthedarkperiod

CC.earlymaturingvariety

DD.latematuringvarietyVernalization第1題Scientistshavefoundthatfloweringisrelatedto(

),observingthatAmericantobaccocanflowerandbearfruitnormallyinFlorida,butdoesnotflowerandbearfruitevenwhenitgrowsto3to5metershighundernaturalconditionsinthesuburbsofWashington.AA.sunshineduration

BB.sunshineintensity

CC.moisturecontent

DD.temperaturecondition第2題Nutrientsofperennialplantsarecapableofnutritiveandreproductivegrowtheveryyear,andtheirmaturityfromthebasetothetopisinconsistent,andingeneral,theplant's(

)isjuvenileAbaseBtopCmiddlepart

D

/Theeffectofplantfloweringinductionandphotoperiod第1題Plantchrysanthemumsbloominthefallundernaturalconditions.If(

)iscarriedoutearlier,thechrysanthemumscanbloomasearlyasJuneorJulyoreven“MayDay”.AA.longdaytreatment

BB.shortdaytreatment

C

C.longandshortdaytreatment

DD.notreatment第2題1.Studieshaveprovedthattheplacewherethephotoperiodicresponseoccursisthe()oftheplant,whiletheplacethatfeelsthephotoperiodicstimulusisthe(

)oftheplant.Agrowingpoint;grownleaf

Bgrowingpoint,growingpointCgrownleaf,grownleaf

Dgrownleaf,growingpointSeedgermination第1題

Theosmoticswellingoflegumeseedscontainingmoreproteinis()thatofcerealseedscontainingmorestarch.Astrongerthan

Bweakerthan

C

equalto

D/第2題Waterabsorptionduringseedgerminationcanbecategorizedinto3stages,whiledormantordeadseedsonlystopinthe(

)ofwaterabsorption.Afirststage

Bsecondstage

Cthirdstage

D/Ripeningofseedsandfruits第1題Unripefruitshaveaflavorofbitternessduetothepresenceof(

)inthefruit.Atannins

Bvolatilecompounds

C

amylacetate

D

citral第2題.Thefruitdevelopsfromtheovaryofthefloralorganand()developsintothepericarp.Inhorticulturalproduction,edibleproductsaremainlyfleshyfruits.AA.theovarywall

BB.ovary

C

C.ovule

DD.endospermnucleusLearnaboutauxin第1題.Auxinisoneoftheearliestplanthormonesdiscovered.In1934,()scientistsKoglandothersisolatedasubstancefromplantsthatcanstimulateplantgrowth,whichwasidentifiedas3-indoleaceticacid(IAA).AA.Dutch

BB.German

C

C.Swedish

DD.Chian第2題（

）isanimportantcharacteristicofauxin.AA.PolartransportBB.Non-polartransportCC.ConcentrationdegreeDD./Gettingtoknowethylene第1題

Ripeningfruitisthemostimportantandsignificanteffectof(

).AA.ethylene

B

B.auxin

CC.cytokinin

DD.abscisicacid第2題Itwasnotuntilthebeginningofthetwentiethcentury(1901)thatNeljubow,a(

)plantphysiologist,firstconfirmedthatethyleneproducedbythelightswastakingeffect,andhealsofoundthatethylenecouldcausethetriplereactionsofyellowedpeaseedlings,whicharedwarfing,thickeningandapicalgrowth.AA.Russian

BB.German

CC.Swedish

DD.DutchPlantgrowthregulator第1題

Gibberellinshavebeenusedandstudiedmostintheproductionof().

A

A、GA1

BB、GA2C

C、GA3D

D、GA4第2題.Potatoesareeasytogerminateinstorage,affectingconsumption.Tightlysealedstorageaftertreatmentwith1%(

)NAAmethylestercanachievethepurposeofinhibitinggermination.Thismethodcanalsobeusedforgarlicstorage.AA、

GA3BB、MH

CC、NAA

D

D、CTK第3題Inproduction,itiscommontouse(

)substancestoeliminatethephenomenonofalternatebearingoffruittrees.AA.auxin

BB.ethylene

CC.cytokinin

D

D.gibberellinPolarmovementofplants第1題

Themotionofthemimosaleavesisatypi