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
外语
Bioluminescence A.In the pitch-black waters of the ocean’s aphetic zone—depths from 1000 m to the sea floor—good eye sight d
Bioluminescence A.In the pitch-black waters of the ocean’s aphetic zone—depths from 1000 m to the sea floor—good eye sight d
admin
2012-01-16
59
问题
Bioluminescence
A.In the pitch-black waters of the ocean’s aphetic zone—depths from 1000 m to the sea floor—good eye sight does not count for very much on its own. Caves, in addition, frequently present a similar problem: the complete absence of natural light at any time of the day. This has not stopped some organisms from turning these inhospitable environments into their homes, and in the process many have created their own forms of light by developing one of the stunning visual marvels of the biological universe—bioluminescence.
B.Many people will encounter bioluminescence at some point in their life, typically in some form of glowworm, which is found on most continents. North and South America are home to the "firefly", a glowing beetle which is known as a glow-worm during its larvae stage. Flightless glowing beetles and worms are also found in Europe, Asia, Australia and New Zealand. Less common flies, centipedes, mollusks and snails have bioluminescent qualities as well, as do some mushrooms. The most dramatic examples of bioluminescence, however, are found deep below the ocean’s surface, where no sunlight can penetrate at all. Here, anglerfish, cookie-cutter sharks, flashlight fish, lantern fish, gulper eels, viper fish and many other species have developed bioluminescence in unique and creative ways to facilitate their lives.
C.The natural uses of bioluminescence vary widely, and organisms have learnt to be very creative with its, use. Fireflies employ bioluminescence primarily for reproductive means—their flashing patterns advertise a firefiy’s readiness to breed. Some fish use it as a handy spotlight to help them locate prey. Cithers use it as a lure; the anglerfish, for example, dangles a luminescent flare that draws in gullible, smaller fishes which get snapped up by the anglerfish in an automated reflex. Sometimes bioluminescence is used to resist predators. Vampire squids eject a thick cloud of glowing liquid from the tip of its arms when threatened, which can be disorientating. Other species use a single, bright flash to temporarily blind their attacker, with an effect similar to that of an oncoming car which has not dipped its headlights.
D.Humans have captured and utilized bioluminescence by developing, over the last decade, a technology known as Bioluminescence Imaging (BLI). BL! involves the extraction of a DNA protein from a bioluminescent organism, and then the integration of this protein into a laboratory animal through transgeneticism. Researchers have been able to use aluminized pathogens and cancer cell lines to track the respective spread of infections and cancers. Through BLI, cancers and infections can be observed without intervening in a way that affects their independent development. In other words, while an ultra-sensitive camera and bioluminescent proteins add a visual element, they do not disrupt or mutate the natural processes. As a result, when testing drugs and treatments, researchers are permitted a single perspective of a therapy’s progression.
E.Once scientists learn how to engineer bioluminescence and keep it stable in large quantities, a number of other human uses for it will become available. Glowing trees have been proposed as replacements for electric lighting along busy roads, for example, which would reduce our dependence on non-renewable energy sources. The same technology used in Christmas trees for the family home would also eliminate the fire danger from electrical fairy lights. It may also be possible for crops and plants to luminescent when they require watering, and for meat and dairy products to "tell us" when they have become contaminated by bacteria. In a similar way, forensic investigators could detect bacterial species on corpses through bioluminescence. Finally, there is the element of pure novelty. Children’s toys and stickers are often made with glow-in-the-dark qualities, and a biological form would allow rabbits, mice, fish, and other pets to glow as well.
Questions 1-5
Reading Passage 1 has five sections, A-E.
Choose the correct headings for sections A-E from the list of headings below.
Write the correct number, i-ix, in boxes 1-5 on your answer sheet.
List of Headings
i Mushrooms that glow in the dark
ii Bright creatures on land and in the sea
iii Evolution’s solution
iv Cave-dwelling organisms
v Future opportunities in biological engineering
vi Nature’s gift to medicine
vii Bioluminescence in humans
viii Purposes of bioluminescence in the wild
ix Luminescent pets
Section A
选项
答案
iii
解析
转载请注明原文地址:https://www.kaotiyun.com/show/AoNO777K
本试题收录于:
雅思阅读题库雅思(IELTS)分类
0
雅思阅读
雅思(IELTS)
相关试题推荐
(A)5(B)10(C)15(D)25(E)Itcannotbedeterminedfromtheinformationgiven.
LetPandQbepointswhicharetwoinchesapart,andletAbethearea,insquareinches,ofacirclewhichpassesthroughPan
Thelengthofarectangularkitchenflooris3feetmorethanitswidth.Ifthelengthoftheflooris12feet,whatisthearea
Assumea10%growthrateinthenumberofemployeeseachyearfrom2000to200Basedonthisinformation,whichofthefollowing
EachofthefollowingisavalidconclusionthatcanbedrawnfromtheinformationinthegraphsEXCEPT
Whichofthefollowingstatementsaretrue?(a)-5
Whatisthesumofthemeasuresoftheinterioranglesofadecagon(10-sidedpolygon)?
A、Dreams,fantasiesandactionstendtobehereditaryphenomenon,suggestingthatone’scultureplaysthemostprimaryroleins
Theelementaryschoolstudentshavea______understandingoffractions;somedaystheycomprehendthemathconcepts,butotherda
Lindaexposedtheillegalactionsofhercompanyandwas,unfortunately,______byherpeersforherethicalactions.
随机试题
对上肢静脉描述正确的是
带模铸造法,复制耐高温模型前的准备有
属于《一、二、三类动物疫病病种名录》中规定的一类动物疫病是
下列哪种情况应及早手术
患儿,女,5岁,白血病,化疗过程中因口腔溃疡需做咽拭子培养,采集标本部位应选择
机会研究的重点是()。
某混凝土大坝主体工程,建设单位将土建工程、安装工程分别发包给甲、乙两家施工单位。在合同履行过程中发生了如下事件:事件1:项目监理机构在审查土建工程施工组织设计时,认为脚手架工程危险性较大,要求甲施工单位编制脚手架工程专项施工方案。甲施工单位项目经理部编制
根据《建设工程施工合同》的规定,关于工程款(进度款)的叙述,错误的一项是( )。
()适用于规模大、投资回报率高、薪酬成本在经营总成本中所占的比率较低、产品市场上的竞争者较少的企业。
根据车船税法律制度的规定,下列车辆计算车船税时,按照货车税额的50%计算的是()。
最新回复
(
0
)