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DMountain chickadees()have some of the strongest spacial memories in the animal kingdom.New researchreveals the genes involved and sheds light on how a changing climate may influence the evolution of this particularskill.In a new study,researchers at the University of Colorado Boulder and the University of Nevada,Reno identifynearly a hundred genes associated with the birds'spacial memory,or ability to recall the locations of objects.Thepaper also suggests a potential balance may exist between having a solid long-term memory and being able to quicklyremove old memories to form new ones.Taylor,the director of CU Boulder's Mountain Research Station and his associates at the University of Nevada,Reno,lead by biologist professor Vladimir Pravosudov,designed a novel technique to assess the spacial memory ofwild mountain chickadees.They hung various feeder groups in California's Sierra Nevada mountains,each with eightseed-filled bird feeders.Each feeder has a gate equipped with a radio frequency reader capable of detecting a tagplaced on chickadees by researchers.The scientists then configured (each gate to only open to specific birds,forcing the chickadees to remember which feeders would open to them.Pravosudov and his team then counted howmany times each chickadee landed on the wrong feeders before they recalled the right one.Using blood samples,the CU Boulder team sequenced()the whole genome of 162 tagged chickadees,resulting in the largest dataset ever collected for examining the genetic basis of chickadee cognitive ability.The teamdiscovered 97 genes involved in chickadee spacial learning and memory by comparing the birds'genomes to theirperformance on the feeder test.The findings could help biologists better understand the evolution of spacial memory in animals,includinghumans."Chickadees are impressive birds,"said Scott Taylor."They can remember tens of thousands of locationswhere they store food across an entire winter and a new set of those the next winter.Their spacial memory is muchmore developed than many other birds that don't have to have this strategy to survive cold winters."32.What do we know about mountain chickadees'spacial memories?A.They are linked with a hundred relevant genes.B.They maintain a good balance in locating objects.C.They are considered powerful in the animal world.D.They might account for the slow change of climate.33.What can a radio frequency reader do in the test?A.Lower the error rate of the chickadees.B.Count the times each chickadee failed.C.Collect the food information of a feeder.D.Identify the chickadee landing on a feeder.34.What does paragraph 4 focus on about the study?A.Blood sampling.B.Genes involved.C.Ability comparing.D.Data gathered.35.What does Scott Taylor imply in the last paragraph?A.Chickadees possess amazing evolutionary capability.B.Many other birds should improve their spacial memory.C.Food storage is vital to the survival of animals in winter.D.Chickadees'spacial memory carries them through winter.第二节(共5小题;每小题2.5分,满分12.5分)阅读下面短文,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Do you feel overwhelmed,frustrated,or uninterested in life lately?36 There are some effective ways todeal with these feelings and regain control over your life.37If you're feeling lost,the first step to regaining direction is to admit your feelings to yourself.Remind yourself英语试题第5页(共8页)
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