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
41
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 C
选项
答案
viii
解析
转载请注明原文地址:https://kaotiyun.com/show/VoNO777K
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.
Youareapplyingfertilizertoyourbackyard.Therectangularyardmeasures40feetwideand70feetlong.Youuse6poundsoff
TriangleABCshownaboveisanisoscelestriangle.Whichofthefollowingstatementsindividuallyprovide(s)sufficientadditiona
Whichofthefollowingstatementsaretrue?(a)-5
Whatisthesumofthemeasuresoftheinterioranglesofadecagon(10-sidedpolygon)?
Researchhasproventhatunliketheirsober______whosloweddownaftermakingamistaketotrytocorrecttheiractions,menwho
Theaveragetemperatureofthelobster-richwatersoffthecoastofFoerklandhasbeenincreasingforsomeyears.Inwarmerwate
Matisse’sart,withitsspectacularimmediacyanditsmysteriousdepths,posesconfoundingproblemsforanalysisWhenHilarySpu
ThewaterseastofCapeHangklipwereoncethecenterofalucrativewild-caughtabalonefishery,butillegalfishinginthemid
ThewaterseastofCapeHangklipwereoncethecenterofalucrativewild-caughtabalonefishery,butillegalfishinginthemid
随机试题
容易发生挤压综合征的部位是
A.Ca2+B.Na+C.K+D.球蛋白E.白蛋白
首次对我国中医药文献全面系统整理与研究的巨著是
下列不属于质量监督机构的质量监督权限的是()。
银行监管是由()主导、实施的监督管理行为,监管部门通过制定法律、制度和规则,实施监督检查,促进金融体系的安全和稳定,有效保护存款人利益。
根据《车辆购置税暂行条例》的规定,下列车辆中可以减免车辆购置税的有()。
有关部委负责人表示,今年将在部分地区进行试点,为全面清理“小产权房”做制度和政策准备。要求各地对农村集体土地进行确权登记发证,凡是小产权房均不予确权登记,不受法律保护。因此,河西村的这片新建房屋均不受法律保护。以下哪项如果为真,最能削弱上述论证?
在窗体上建立三个菜单(名称分别为Read、Calc和Save,标题分别为“读入数据”、“计算并输出”和“存盘”),然后添加一个文本框(名称为Text1,可显示多行,ScrollBars属性设置为2)(如图所示)。程序运行后,如果执行“读人数据”命令,则读入
软件的特点不包括()。
Moreandmoreoftheworld’spopulationarelivingintownsorcities.Thespeedatwhichcitiesaregrowinginthelessdevelop
最新回复
(
0
)