**TI83F* AppVariable file 10/03/03, 11:50B BBIOLOGYBBGcklm'n  ? ;M^!#%F'Y),,/702v34667h89 ::<=>UAABiologyO Thematerialsincludedinthesefilesareintendedfornon-commercialusebyAP*teachersforcourseandexampreparation;#permissionforanyother*usemustbesoughtfrom1theAdvancedPlacementPProgram*.Teachersmayreproducethem,inwholeorinpart,inlimitedquantities,forface-to-faceteaching#purposesbutmaynotmass*distributethematerials,1electronicallyorPotherwise.Thesematerialsandanycopiesmadeofthemmaynotberesold,andthecopyrightnoticesmustberetainedasthey#appearhere.This*permissiondoesnotapply1toanythird-partyPcopyrightscontainedherein.THISISNOTACOMPLETEEXAMINATION.*CollegeBoard,Advanced#PlacementProgram,and*APareregistered1trademarksoftheCollegePEntranceExaminationBoard.Copyright(C)2003bytheCollegeBoard.Allrightsreserved.Anymodificationofthese#electronicfilesisstrictly*prohibited.1PPThefollowingquestionscomefromAPCentral*,theCollegeBoard'sOnlineHomeforAP*Professionals.TofindTI#StudyCardsfilesofAP*examreviewquestionsfor1othersubjects,pleasevisitPhttp://apcentral.collegeboard.com/ti/apquestions*CollegeBoard,Advanced#PlacementProgram,and*APareregistered1trademarksoftheCollegePEntranceExaminationBoard.PPa1.Whichofthefollowingbestdescribesanintimateecologicalassociationinwhichanorganismbenefitsfromlivingonor#withinahost,but*whichgenerallyhasa1negativeeffectonthatPhost?(A)Mutualism(B)Saprophytism(C)Commensalism(D)Parasitism#(E)Predation*P(D)ParasitismP2.Whilestudyingacellwiththeelectronmicroscope,ascientistnotesthefollowing:numerousribosomes,a#well-developed*endoplasmicreticulum,1chloroplasts,andacellPwall.Whichofthefollowingcouldbethesourceofthiscell?(A)Afungus(B)Ananimal#(C)Abacterium*(D)Aplant1(E)AvirusP(D)AplantP3.Whichofthefollowingstatementsbestsummarizesorganicevolutionasitisviewedbymodernevolutionists?#(A)Itisgoaldirected.*(B)Itrepresentsthe1resultsofselectionforPacquiredcharacteristics.(C)Itissynonymouswiththeprocessofgeneflow.(D)Itisthedescentofhumansfromthepresent-#daygreatapes.*(E)Itisthedifferential1survivalandreproductionPofcertainphenotypes.P(E)Itisthedifferentialsurvivalandreproductionofcertainphenotypes.P4.IfasegmentofDNAis5'-TACGATTAG-3',theRNAthatresultsfromthetranscriptionofthissegmentwillbe#(A)3'-TACGATTAU-5'*(B)3'-ATGCTAATA-5'1(C)3'-UACGAUUAG-5'P(D)3'-AACGAUUAA-5'(E)3'-AUGCUAAUC-5'P(E)3'-AUGCUAAUC-5'P5.ThebonesofahumanarmarehomologoustostructuresinallofthefollowingEXCEPTa(A)whaleflipper#(B)batwing*(C)butterflywing1(D)birdwingP(E)frogforelimbP(C)butterflywingP 6.Regardingmitosisandcytokinesis,onedifferencebetweenhigherplantsandanimalsisthatinplants(A)thespindlescontain#cellulosemicrofibrilsin*additiontomicrotubules,1whereasanimalspindlesdoPnotcontainmicrofibrils(B)sisterchromatidsareidentical,whereasinanimalstheydifferfromoneanother#(C)acellplatebeginsto*formattelophase,1whereasinanimalsaPcleavagefurrowisinitiatedatthatstage(D)chromosomesbecomeattachedtothespindleatprophase,whereasin#animalschromosomesdo*notbecomeattacheduntil1anaphaseP(E)spindlepolescontaincentrioles,whereasspindlepolesinanimalsdonotP(C)acellplatebeginstoformattelophase,whereasinanimalsacleavagefurrowisinitiatedatthatstage#P7.Acommonfeatureofstarchandglycogenisthatmoleculesofboth(A)formmicrofibrilsthatgivesupporttoconnective#tissuefibers*(B)containrepeated1monomersofglucoseandPgalactose(C)areimportantstructuralcomponentsofplantcellwalls(D)arepolymersof#glucose*(E)arewater-soluble1disaccharidesP(D)arepolymersofglucosePH8.Theancestorsoflandplantsmostlikelyresembledmoderndaymembersofthe(A)Cyanobacteria(blue-#greenalgae)*(B)Rhodophyta(redalgae)1(C)Chlorophyta(greenPalgae)(D)Phaeophyta(brownalgae)(E)Chrysophyta(diatomsandgolden-brownalgae)#P(C)Chlorophyta(greenalgae)Pg9.Whichofthefollowingoffersthebestdescriptionofneuraltransmissionacrossamammaliansynapticgap?#(A)Neuralimpulsesinvolve*theflowofK+andNa+1acrossthegap.P(B)Neuralimpulsestravelacrossthegapaselectricalcurrents.(C)Neuralimpulsescausethereleaseofchemicals#thatdiffuseacrossthegap.*(D)Neuralimpulsestravel1acrossthegapinbothPdirections.(E)Thecalciumwithintheaxonsanddendritesofnervesadjacenttoasynapseactsasthe#neurotransmitter.P(C)Neuralimpulsescausethereleaseofchemicalsthatdiffuseacrossthegap.P10.WhichofthefollowingstatementsistrueabouttheKrebs(citricacid)cycleandtheCalvin(light-independent)cycle?#(A)Theybothresultina*netproductionofATPand1NADH.P(B)TheybothrequireanetinputofATP.(C)Theybothresultinareleaseofoxygen.(D)Theybothtakeplace#withinthecytoplasmic*matrix.1(E)TheybotharecarriedPoutbyenzymeslocatedwithinanorganellematrix.P(E)Theybotharecarriedoutbyenzymeslocatedwithinanorganellematrix.P11.Twofossilvertebrates,eachrepresentingadifferentclass,arefoundintheundisturbedrocklayersofacliff.Onefossil#isarepresentativeofthe*earliestamphibians.The1otherfossil,foundinanPolderrocklayerbelowtheamphibian,ismostlikelytobe(A)adinosaur(B)afish#(C)aninsectivorous*mammal1(D)asnakeP(E)abirdP(B)afishP`12.Thebondingoftwoaminoacidmoleculestoformalargermoleculerequires(A)thereleaseofawater#molecule*(B)thereleaseofacarbon1dioxidemoleculeP(C)theadditionofanitrogenatom(D)theadditionofawatermolecule(E)anincreasein#activationenergy*P(A)thereleaseofawatermoleculeP13.Ifyoungmalezebrafinchesareraisedbyfosterparentsofanotherspecies,theBengalesefinch,theywillcourt#femaleBengalesefinches*insteadoffemalesoftheir1ownspecies.ThisbehaviorPresultsfromwhichofthefollowing?(A)Imprinting(B)Habituation(C)Conditioning#(D)Reinforcement*(E)Pheromones1P(A)ImprintingPQ14.Therelativelocationoffourgenesonachromosomecanbemappedfromthefollowingdataoncrossover#frequencies*1PGenesFrequencyofCrossoverBandD5%CandA15%AandB30%#CandB45%*CandD50%1WhichofthefollowingPrepresentstherelativepositionsofthesefourgenesonthechromosome?(A)ABCD(B)ADCB#(C)CABD*(D)CBAD1(E)DBCAP(C)CABDP15.Whenhydrogenionsarepumpedoutofthemitochondrialmatrix,acrosstheinnermitochondrialmembrane,#andintothespace*betweentheinnerand1outermembranes,thePresultis(A)damagetothemitochondrion(B)thereductionofNAD(C)therestorationofthe#Na-Kbalanceacrossthe*membrane1(D)thecreationofaPprotongradient(E)theloweringofpHinthemitochondrialmatrixP(D)thecreationofaprotongradientP16.Oncetranscribed,eukaryoticmRNAtypicallyundergoessubstantialalterationthatresultsprimarilyfrom#(A)excisionofintrons*(B)fusionintocircular1formsknownasplasmidsP(C)linkagetohistonemolecules(D)unionwithribosomes(E)fusionwithothernewlytranscribedmRNA#moleculesto*formlargertranslatable1unitsP(A)excisionofintronsPX17.Thefunctionofwaterinphotosynthesisisto(A)combinewithCO2(B)absorblightenergy(C)supplyelectronsinthe#light-dependentreactions*(D)transportH+ionsinthe1light-independent(dark)Preactions(E)provideO2forthelight-independent(dark)reactionsP(C)supplyelectronsinthelight-dependentreactionsPDirections:Eachsetofletteredchoicesbelowreferstothenumberedwordsorstatementsimmediatelyfollowingit.#Selecttheonelettered*choicethatbestfitseach1wordorstatement.APchoicemaybeusedonce,morethanonce,ornotatallineachset.Questions18-21:Thefigurebelowrepresentsafood#webinaparticular*ecosystem.Eachletter1representsaspecies.TheParrowsindicatethedirectionofenergyflow.PPbio-18-21 8^ H@@@p x@ @ pX `     0@@ `@1 @ 00 $<0$2$a88p|$Xp `< pX   b  07~``|~@~<<  'QĈd @!d@ N p Ĉ!@H $@$ "@$xPP18.Whichspecieswouldmostlikelyrepresenthumansiftheywerepartofthisecosystem?(A)A#(B)B*(C)C1(D)DP(E)EP(C)CPbio-18-21 8^ H@@@p x@ @ pX `     0@@ `@1 @ 00 $<0$2$a88p|$Xp `< pX   b  07~``|~@~<<  'QĈd @!d@ N p Ĉ!@H $@$ "@$xPP19.Aphotosyntheticorganismwouldberepresentedbywhichspecies?(A)A#(B)B*(C)C1(D)DP(E)EP(A)APbio-18-21 8^ H@@@p x@ @ pX `     0@@ `@1 @ 00 $<0$2$a88p|$Xp `< pX   b  07~``|~@~<<  'QĈd @!d@ N p Ĉ!@H $@$ "@$xPPr20.Membersofwhichspeciesareherbivores?(A)A(B)B(C)C#(D)D*(E)EP(D)DPbio-18-21 8^ H@@@p x@ @ pX `     0@@ `@1 @ 00 $<0$2$a88p|$Xp `< pX   b  07~``|~@~<<  'QĈd @!d@ N p Ĉ!@H $@$ "@$xPP21.Membersofwhichspeciesaremostlikelytobeomnivorous?(A)A(B)B#(C)C*(D)D1(E)EP(C)CP22.Foundinbothprokaryoticandeukaryoticcells(A)Centriole(B)Lysosome#(C)Nucleolus*(D)Peroxisome1(E)RibosomeP(E)RibosomeP23.Possessesamicrotubularstructuresimilarinformtoabasalbody(A)Centriole#(B)Lysosome*(C)Nucleolus1(D)PeroxisomeP(E)RibosomeP(A)CentrioleP24.Assemblesribosomalprecursors(A)Centriole(B)Lysosome(C)Nucleolus#(D)Peroxisome*(E)Ribosome1P(C)NucleolusP25.Containshydrolyticenzymesassociatedwiththeintracellulardigestionofmacromolecules(A)Centriole#(B)Lysosome*(C)Nucleolus1(D)PeroxisomeP(E)RibosomeP(B)LysosomeP26.Thisbiomeexhibitsthegreatestdiversityinplantspecies.(A)Grassland(B)Taiga#(C)Deciduousforest*(D)Tundra1(E)TropicalrainforestP(E)TropicalrainforestP27.Inthisbiome,agricultureiscommonlypracticedina"cut-burn-cultivate-abandon"mode.(A)Grassland#(B)Taiga*(C)Deciduousforest1(D)TundraP(E)TropicalrainforestP(E)TropicalrainforestP28.Thisbiomecanberecognizedbyitsconiferousforestsandrelativelyinfertile,acidicsoil.#(A)Grassland*(B)Taiga1(C)DeciduousforestP(D)Tundra(E)TropicalrainforestP(B)TaigaPQuestions29-31Alargepopulationoflaboratoryanimalshasbeenallowedtobreedrandomlyforanumberof#generations.Afterseveral*generations,49percentof1theanimalsdisplayaPrecessivetrait(bb),thesamepercentageasatthebeginningofthebreedingprogram.Therestoftheanimalsshowthedominant#phenotype,with*heterozygotes1indistinguishablefromthePhomozygousdominants.PP29.Whatisthemostreasonableconclusionthatcanbedrawnfromthefactthatthefrequencyofallelebhasnotchanged#overtime?*(A)Thepopulationis1undergoinggeneticdrift.P(B)Thetwophenotypesareequallyadaptiveunderlaboratoryconditions.(C)ThegenotypeBBislethal.#(D)Therehasbeenahigh*rateofmutationofallele1Btoalleleb.P(E)Therehasbeensexualselectionfavoringalleleb.P(B)Thetwophenotypesareequallyadaptiveunderlaboratoryconditions.P30.Whatisthefrequencyofallelebinthegenepool?(A)0.70(B)0.51(C)0.49#(D)0.30*(E)0.071P(A)0.70P31.Whatproportionofthepopulationisheterozygous(Bb)forthistrait?(A)0.51(B)0.42#(C)0.21*(D)0.091(E)0.07P(B)0.42P5