首页
登录
职称英语
[originaltext] Winter is a pain in the animal kingdom. Birds can flee it by
[originaltext] Winter is a pain in the animal kingdom. Birds can flee it by
游客
2023-08-27
15
管理
问题
Winter is a pain in the animal kingdom. Birds can flee it by migrating to wanner regions but grounded beasts, including mammals, have no choice but to stick around.(33)To cope, many species have learned to spend the winter in a long sleep. Some, like the Columbian ground squirrel, spend up to nine months of each year in their shelters. This conserves energy but leaves them with only three months to become well-rounded for the next winter and, crucially, to reproduce.
To make matters worse, climate change is leading them to emerge from winter sleep later than usual.(34)Global warming should mean that the creatures have longer ice-free periods in which to go about their evolutionary tasks. But it can also disturb weather patterns , which may have the opposite effect.
Because female squirrels remain in their place of birth, the researchers were able to tag and observe them and their offspring each year for the past two decades. A typical female would bear three babies. On average, only 30% of them survive the first winter, enough to sustain population numbers since female squirrels can expect three or four litters in their lifetime. If the proportion falls, however, the population reduces.
In the first decade of the study the number of squirrels dropped just once. But it fell in four of the past ten years.(35)Dr. Lane, an evolutionary biologist at. the University of Edinburgh, speculates that this might be explained by the fact that over the past 20 years the late snow has delayed the melting of ice by half a day each year, on average, shortening the squirrels’ breeding and feeding season by several days and disrupting their life cycles.
33. How do many species of animals spend the winter?
34. What should global warming mean to the animals?
35. What might explain the reduced squirrel population according to Dr. Lane?
选项
A、Sleep for a long time.
B、Migrate to warmer areas.
C、Eat more food to keep warm.
D、Store up food for the next year.
答案
A
解析
文章在开头部分提到,为了应对寒冷的冬天,许多生物学习通过冬眠度过冬季,故答案为A)。
转载请注明原文地址:https://tihaiku.com/zcyy/2961489.html
相关试题推荐
[originaltext]Itusedtobethatmentallyretardedchildrenweretreatedli
[originaltext]Itusedtobethatmentallyretardedchildrenweretreatedli
[originaltext]Cultureshockoccursasaresultoftotalimmersioninanew
[originaltext]Evenifyouhaven’ttouchedapianoinyears,ifyousuffered
[originaltext]Evenifyouhaven’ttouchedapianoinyears,ifyousuffered
[originaltext]W:Twomillionhighschoolseniorsaregearingupthisfalltoap
[originaltext]W:Twomillionhighschoolseniorsaregearingupthisfalltoap
[originaltext]M:Betty,youspeakseverallanguages,don’tyou?W:Yes,Ispeak
【B1】[br]【B10】[originaltext]Shynessisthecauseofmuchunhappinessfora
【B1】[br]【B9】[originaltext]Shynessisthecauseofmuchunhappinessforag
随机试题
[originaltext]Today,I’dliketotalkaboutaresearchwhichshowsthatbabi
Ourerawitnessesmanycaseswhereourownlibertycontradictswithothers
五岳(theFiveGreatMountains)是中国五大名山的总称。它们是东岳泰山、南岳衡山、西岳华山、北岳恒山、中岳嵩山。五岳虽不是最高的山
以下关于质量控制点的表述不正确的是( )。A、是施工质量计划的组成内容 B、
A.AB.BC.CD.D
历史:明智A.新闻:广播 B.法律:约束 C.制度:学问 D.政策
关于定期租船的特点,下列说法错误的是()。A:不规定装卸期限或装卸率 B:不计
脂肪酸β氧化酶系存在于A.胞液 B.线粒体基质 C.内质网 D.线粒体内膜
市场法的理论依据是房地产价格形成的替代原理。()
下列不属于脑源性抽搐与惊厥的是A.高热惊厥 B.高血压脑病 C.结节性硬化
最新回复
(
0
)