首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Turtles have an unfortunate habit of eating plastic objects floating in the sea. These then get trapped in their alimentary cana
Turtles have an unfortunate habit of eating plastic objects floating in the sea. These then get trapped in their alimentary cana
admin
2022-11-16
97
问题
Turtles have an
unfortunate
habit of eating plastic objects floating in the sea. These then get trapped in their alimentary canals, cannot be broken down by the animals’ digestive enzymes and may ultimately kill them. It is widely assumed that this liking for plastics is a matter of mistaken identity. Drifting plastic bags, for instance, look similar to jellyfish, which many types of turtles love to eat. Yet lots of plastic objects that end up inside turtles have no resemblance to jellyfish. Joseph Pfaller of the University of Florida therefore suspects that something more complicated is going on. As he writes in Current Biology, he thinks that the smell of marine micro-organisms which colonize floating plastic objects induces turtles to feed.
The idea that the smell of plastic rubbish might lure animals to their doom first emerged in 2016. Researchers at the University of California, Davis, noticed that certain chemicals, which are released into the air by micro-organism-colonized plastics, are those which many seabirds sniff to track down food. These chemicals mark good places to hunt because they indicate an abundance of the bacteria that lie at the bottom of marine food chains. The researchers also found that birds which pursue their food in this way are five or six times more likely to eat plastic than those which do not.
Since turtles are known to break the surface periodically and sniff the air when navigating towards their feeding areas, Dr. Pfaller theorized that they are following these same chemicals, and are likewise fooled into thinking that floating plastic objects are edible.
To test that idea, he and his colleagues set up an experiment involving loggerhead turtles, a species frequently killed by plastic. They arranged for 15 of the animals, each around five months old, to be exposed, in random order, to four smells delivered through a pipe to the air above an experimental area. Two of the smells proved far more attractive to the animals than the others. When sniffing both the smell of food and that of five-week-old bottles turtles kept their noses out of the water more than three times as long, and took twice as many breaths as they did when what was on offer was the smell of fresh bottle-plastic or clean water vapour. On the face of it, then, the turtles were responding to the smell of old bottles as if it were the smell of food.
Though they have not yet tested whether the chemical is the culprit, Dr. Pfaller and his colleagues think it is the most likely candidate. In an unpolluted ocean, pretty well anything which had this smell would be edible—or, at least, harmless. Unfortunately, five-week-old plastic bottles and their like are not.
The text is mainly about________.
选项
A、the function of chemicals in turtles’ diet
B、the attraction of plastic rubbish to turtles
C、the reasons of turtles’ liking for plastics
D、the theories on eating habits of turtles
答案
C
解析
由题干关键词the text is mainly about可知,本题为主旨要义题,考查对整篇文章主旨大意的理解和概括。文章第一段引出话题,说明了海龟吞食塑料垃圾的后果,并列举了过去和现在的两种海龟喜欢吞食塑料垃圾的可能原因;第二段中,加利福尼亚大学戴维斯分校的研究人员们指出了海鸟喜欢吃塑料垃圾的原因;第三段中,约瑟夫.普法勒博士根据海龟的特性指出海龟吞食塑料垃圾的原因;第四段列举了约瑟夫.普法勒博士为了证明他的理论所做的实验。第五段总结全文,目前还不能确认塑料垃圾中的某些化学物质是导致海龟吞食塑料垃圾的罪魁祸首,但其可能性最大。由此可见,本文主要讨论了海龟喜欢吞食塑料垃圾的原因,C项为正确答案。文章虽然提到了“化学物质”,但“化学物质”只是海龟吞食塑料垃圾原因中的一环,故A项the function of chemicals in turtles’ diet (化学物质在海龟饮食中的作用)应排除;文章一开头就点出了“海龟喜欢吞食塑料垃圾”,这只是本篇文章的切入点,所以B项the attraction of plastic rubbish to turtles(塑料垃圾对海龟的吸引力)很片面,故应排除,文章中虽然提到了海龟喜欢吃塑料,但这只是海龟饮食的一种,而并没有说明海龟其他的饮食习惯,故D项the theories on eating habits of turtles(关于海龟饮食习惯的理论)错误。
转载请注明原文地址:https://kaotiyun.com/show/abMD777K
0
考研英语二
相关试题推荐
Skepticsofhighereducationoftencomplainthatuniversitiesoffertoomanyboringdegreeswithlittlevalueintheworkplace.【
ZoeBuhlerwasscheduledforanultrasoundappointmentontheSeptembermorningwhenAustralianpoliceenteredherhome.Thepre
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
AstudyinCyberpsychology,Behavior,andSocialNetworkingsuggeststhatartificialintelligenceholdsapromisingfutureinhe
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Theworldeconomyhasrunintoabrickwall.Despitecountlesswarningsinrecentyearsabouttheneedtoaddressaloominghung
Peoplehavespeculatedforcenturiesaboutafuturewithoutwork.Todayisnodifferent,withacademics,writers,andactivists
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
随机试题
设z=esinxy,则dz=().
男性,44岁。因食入烙饼,食管静脉破裂出血约1000ml,输入大量库存血后,出现心率缓慢、手足抽搐、血压下降、伤口渗血。出现以上症状的有关因素是()。
债券的承销可采取包销和代销方式,承销或者自行组织的销售,销售期最长不得超过( )日。
行政复议,是指公民、法人或者其他组织认为行政主体的具体行政行为违法或不当侵犯其合法权益,依法向主管行政机关提出复查该具体行政行为的申请,行政复议机关依照法定程序对被申请的具体行政行为进行合法性、适当性审查,并作出裁决的活动。根据上述定义,下列属于行政复议行
遵义会议是中国共产党历史上一个生死攸关的转折点。
设y=y(x)由yexy+xcosx-1=0确定,则dy|x=0=_______。
A、 B、 C、 D、 B集中式是所有数据片段都安排在一个场地上;分割式是所有全局数据有且只有一份。它们被分割成若于片段,每个片段被分配在一个特定的场地上;混合式是全局数据被分为若干个数据子集,每个子集被安排
在逻辑结构设计中,关系虽已达到规范化,但因某些属性过多时,可将它分为两个或多个关系模式,这叫做
在双绞线组网的方式中,______是以太网的中心连接设备。
在软件测试设计中,软件测试的主要目的是
最新回复
(
0
)