教材试题 unit 2 reading discussing and writing 的习题

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1、Unit2CloningReading,discussingandwriting1Readthepassageandanswerthequestions.1Whyshouldn’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?____________________________________________________________________2Whyisitwrongtocloneanextincta

2、nimalifitwouldhavetoliveinazoo?____________________________________________________________________3Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?____________________________________________________________________2Nowinpair

3、sdiscusswhichextinctanimalsdescribedbelow(whichdiedoutlessthan10,000yearsago)areworthrestoringbymeansofcloning.Chooseoneanimalfromthetablebelowandusetheinformationtohelpyouarguewhythisanimalshouldberestoredtotheearth.Maythebestanimalwin!Nameanddatewh

4、enlastseenInformationAuroch(1627)Largewildcattle;longhornsandhair;hairgoodformakingintoclothes;hornscanbeusedfordecoration;needgrasslands.Dodobird(1755)Unabletofly;friendlyandnotharmful;largeeggsandtastymeatthatcouldbedevelopedforfood;needshotclimate

5、.GreatAuk(1844)Verylargebirdthatcannotfly;livesbyandinthesea;feathersdonotabsorbwater;usefulforprotectingclothesfromwater.Skinlookslikeazebra;canbeusedforQuagga(1883)decoration;meatverytasty;needswarmclimate.3Whenyouhavebothagreedononeanimal,makealis

6、tofyourreasonsforrestoringit.Writeashortreporttogetherexplainingwhyyouthinkyourchoiceisthebest.Remembertoaddreasonstopersuadeotherpeople.Youcanuseotherinformationbesidestheinformationgiven.4Whenyouhavefinished,swapyourreportwiththatofanotherpairandse

7、ewhethertheyareconvincedbyyourarguments.Helpthemtoimprovetheirwritingandtheyalsohelpyouwithyours.Reviseyourreportandbepreparedtoreaditaloudinclass.Reading,discussingandwritingAnswerkeyforExercise1：1Therewillnotbeenoughgeneticvariationinthegrouptobeab

8、letoresistnewillnesses.2Itisnotagoodideatocloneananimalthatwouldhavetoliveinazoobecauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.3TheDNAofanimalsmorethan10,000yearsoldisnotsuitableforcloning,fo