[新疆]兵团地州学校2023-2024学年度高二金太阳第一学期期末联考(24-269B)英语答案

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Sadly,biologists soon realized that DNA in fact breaks down super-fast;even after 100years,DNA from museum skins of dodos was decayed (beyond repair.They could besequenced(测定序列)using massive computational power,but then only with considerableuncertainty.And even if you capture a DNA sequence,there's still the problem of how you getliving cells to read that sequence and express proteins that make the dinosaur or the dodo.But why would anyone want to see mammoths,or something like them,roaming (present-day Siberia?Well,they were undoubtedly amazing beasts.As well as hunting them,ourdistant ancestors painted their likenesses in caves across Europe.Fascinating as they may be,there's some ecological justification for the project too.It was this diversity of land surface,broken up by heavy limbs and randomly fertilized byfaeces(排泄物)，that supported so much flora(植物群).Without the mammoths,that diversitydisappeared.Return them and landscapes would once again be with a variety of species,includingflowers and bushes.True,it's not de-extinction.in the sense of bringing a long-dead species back to life.Insteadit's more like making a "dodo"by engineering a modern pigeon,its closest relative,to becomehuge and flightless.The result would be a big,fatty pigeon that,whether it looked like a dodo ornot,would probably fulfill some of its ecological roles.As apaleontologist,I would of course love to see living dinosaurs,mammoths and dodos.Insome ways,though,I am relieved that the optimistic claims for cloning and genetic technologieshave not been borne out.The slowdown gives us time to consider the outcomes-and hopefullyavoid some of Michael Crichton's more fevered imaginings.32.What is paragraph 2 of the text mainly about?A.A science fiction review.B.The development of DNA.C.An inspired guess of de-extinction.D.The application of PCR technology.33.Why are people interested in cloning extinct species?A.They expect to seek hunt fun.B.They lack sources of modern art.C.They want to see biodiversity,D.They need them for research.34.What does the slowdown in cloning and genetic technologies allow the author to do?A.Witness the birth of cloned dinosaurs.B.Avoid Michael Crichton's imaginings.C.Stop the progress of genetic engineering.D.Consider the potential outcomes of these technologies.一7CS扫描全能王3亿人都在用的扫措ApP