igcse生物15年前真题0610 wms

06100610Paper6(AlternativetoumrawmarkInternational ofSecondaryMARKSCHEMEfortheOctober/November2009questionpaperfortheguidanceofteachersThismarkschemeispublishedasanaidtoteachersandcandidates,toindicatetherequirementsoftheexamination.ItshowsthebasisonwhichExaminerswereinstructedtoawardmarks.ItdoesnotindicatethedetailsofthediscussionsthattookceatanExaminers’meetingbeforemarkingbegan,whichwouldhaveconsideredtheacceptabilityofalternativeanswers.MarkschemesmustbereadinconjunctionwiththequestionpapersandthereportontheCIEwillnotenterintodiscussionsorcorrespondenceinconnectionwiththesemarkCIEispublishingthemarkschemesfortheOctober/November2009questionpapersformostIGCSE,GCEAdvancedLevelandAdvancedSubsidiaryLevelsyllabusesandsomeOrdinaryLevelPageMarkScheme:Teachers’Symbolsusedinmarkschemeandguidance separatesalternativesforamarking separatespointsfortheawardofa accept–asacorrect reject–thisismarkedwithacrossandanyfollowingcorrectstatementsdonotgainany ignore/irrelevant/inadequate–thisresponsegainsnomark,butanyfollowingcorrectanswerscangainmarks.() theword/phraseinbracketsisnotrequiredtogainmarksbutsetscontextofresponseforcredit.e.g.(waxy)cuticle.Waxynotneededbutifitwasdescribedasacellulosecuticlethennomark. underlinedwords–thiswordonly/mustbespelledcorrectly orreverseargument/answerref./refs.answermakesappropriatereferenceto additionalvalidpoint(e.g.incomments) alternativewordsofequivalent©UCLESPagePageMarkScheme:Teachers’©©UCLESMark1(a)descriptionofcurvatureindescriptionofcurvaturein for0.8MAfirst/left for0.0MAsecond/ curve/ outerlayer outside/convex inside/concaveinnerlayer inside/concave/ shrunk/ hollow hollowIthicker thinnerlossofwater/exosmosisin0.8molarsaltreferenceto(cells)shrinking ingflaccid/increaseinwater/endosmosisin0.0referenceto(cells)swelling ingdefinitionofosmosis(mustrefertogradientandspwax/waterprooflayer/ [MAXRsaltPoints2+3andpoints4+5areAwaterconc./saltconc./hyperorhypotonicinacorrectcontextAsaltsolution.–asreferenceto0.8rangeofsaltsolutions/differentsamesament/type/species/samesize/length/massatmeasurecurvature/nochange(inmass/plotgraphofconcagainstchangeinrepeat(experiment/morestemsper [MAXPoints1and2arenotvalidfor0.0Mand0.8Monly,needA30minsItemp/Ireferenceto[Total:PagePageMarkScheme:Teachers’©©UCLES2Drawing:1flowerasinfig.2noshading/ic 1threestamens/anthers+filaments/2stigma/345 [MAXA+or–petals/floralpartsseparate(evenifreceptacleisnotdrawn.)RstylisedAalllabelsonstylisedlabellinetotouchsurface/inside/curvedoneonmusthavedoublelineseithersideandcanbelabelledtobaseofreceptaclelabelmarks=MAX4butMAX2forstylisedstamen/anther/filamentisoutside/hanging/looselyattached;long/bendyfilament;style/stigmaisfeathery/furry/largeSA/long/large Ilabels(butcanaccepte.c.f.fromApollenIsticky/outside/Ipollen(notvisible)/pistil/carpelInegativecommentse.g.nonectaries/petals/(c)onesimilarity:bothhavestamens/anthers/ Fig. Notstamens/anthersenclosedwithinpetals stamens/antherposedoutsidefirmly looselystigma/styleenclosedwithin stigma/styleoutsidestigma/styleissmall/curved/ stigma/stylehaslargeSAlarge/feathery/hairy/ needtobematched LISTIsize/colour/AcanbeIIAmale+femalepartsareinside/outsideflower=1needboth,donotawardifstigma/stamengiven[Total:PagePageMarkScheme:Teachers’©©UCLES3(a)orientationandlabelofaxes; suitablescaletofill>1/2grid;plot neatlinepassingthroughplotted barchart=MAX1forOrientationpHonX–axis(ignorePH)andtime/sonY-axis;judgedbyplottedpointsandscaleshouldbelinearincludingbrokenaxis.+/-0.5squareforallpoints/pointtopointruledlineorsmoothcurvepassingthroughallpoints.Noextrapolationofline.recordoptimum/7–faster/increaserate,pH3-7/morealkalineordecreaserate,pH7–3/moredecreaserate,pH7-8/morealkalineorincreaserate,pH8–7/more/less [MAXIfrefertoextremepH’sonly–Maxi.e.ratedecreasesfrompH7topH3ande.g.can’tbeexactlysureofoptimumasnotenoughpointsaroundpH7Fourcontrolsamesizeofapparatus/samesize/type/massofpaper/concentrationofmoresophisticatedtimer/stopwatch/datasafetyfeaturesincludesusepstohandlepiecesofpaper//gloves/labcoats/volumeofoxygenmeasured/increaseintermediatepH/valuesbetween3and [MAXIfallconditionsandenvironmentthesameallowMax1forPoints1&2. IcleanapparatusAfindaverage/twoIincreaserangeofpHunqualified/increasingatonerangeofcontroltemperaturee.g.keeptubesinwaterbaththroughoutinvestigation/sametemperature;equilibratetubesindifferentwaterbathsfor5mins–wayofachievingtemperaturebearting;samevolume/concentrationofhydrogensameenzymesourceorconcentration/samesizeortypeormassoffilterpaper;samesizeoftubing/apparatus/testrepeats/findvolumeofoxygenmeasured/plotagraphofsafetyfeatures:includesusepstohandlepiecesofpaper//gloves/labcoat/ [MAXanypHtoshowAHightoLow/differenttemperatures/atleast3/cold&warm&hot.Aarea/amountoffilterIcleanorsterilised[Total:大学国际考试国际普通中等教育标记计划2009年10月/11月试卷，供教师指06100610/06试卷6（替代实用），最大原始分数有表明评分开始前员会议上进行的讨论的细节，该讨论会考虑替代答案的可接受性。CIECIE正在发布大多数IGCSE、GCE高级和高级附属级别课程以及一些普通级别课程的2009年月/11第2页评分方案：教师版IGCSE教学大纲文件–2009年10月/11月0610A受–作为正确的回答R–标有叉号，并且以下任何正确的陈述不会获得任何分数忽略/o)括号中的单词/短语不需要获得分数，但可以设置得分的响应上下文。例如（蜡状）角质层。带下划线的小字–仅此字/必须拼写正确ORA或反向论证/答案参考/参考。答案适当了AW等价替代词UCLES20093评分方案：教师版IGCSE试卷–2009年10月/11(a)(i)0.8M0.0M[2]为0.8MA第一/左；为0.0MA秒/右；0.8M0.0M曲线/向内向外弯曲外层外/内凸/内凹内层内/凹/外/凸/收缩/收缩膨Iii)120.83（细胞）收缩/变得松弛/质壁分离；4.0.05提及（细胞）6渗透的定义（sp）；7[MAX4]R盐运动点23和点4+5关联A水浓度。/盐浓度/正确情况下的或低补盐溶液。–参考摩尔b)1种盐溶液/不同浓度；2同时；3相同植物/类型/种类/蒲公英；45（质量/曲率）；67复（实验/每浓缩茎）；[MAX4]第1点和第2点仅对0.0M和0.8M无效，需要330分钟最小I温度/条件I参考控制总计第4页评分方案：教师版IGCSE教学大纲文件–2009年10月/11月0610(a)绘图：如图1所示的1。2.1；2无底纹/线条；。。。。。。。。。。。。……。。。。。。。。。。。。。。。标签：1个三/花药+花丝/花药；2柱头/花柱；3片花瓣；4萼片；5;[最多6]A+或–花瓣/花卉部分分开（即使未绘制花托。）R程式化的花朵A程式化图表上的所有接触表面/ /弯曲部分的线左边的一侧必须有双线并且可以标记到花托底部标签标记=MAX4，但对于程式化图表，MAX2b)/花药/花丝在外面/悬挂/松散地附着；长/弯曲的细丝；风格/柱头呈羽毛状/毛茸茸/大SA/长/大AW；[3]I（但可以接受图表中的e.c.f.）花粉囊I粘性/外部/I花粉（不可见）//心皮I评论，例如没有蜜腺/花瓣/气味c)(i)一个相似之处：两者都有 /花药/柱头；[1]ii)图2.1图2.2花瓣不存在；/花药封闭在花瓣内//花药 花柱封闭在花瓣内柱头/花柱在花外；柱头/花柱小/弯曲/单柱头/花柱大SA/大/羽毛状/毛状/多；[4]需要配对列表规则I大小/颜色/气味花丝可以比较I粘性I