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
30
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 B
选项
答案
ii
解析
转载请注明原文地址:https://kaotiyun.com/show/NoNO777K
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
Arancherwishestoencloseafieldthatmeasures12feetby27feet.Hepurchases76feetoffencingmaterialthatmustbeaffi
Anintegerfrom10through99,inclusive,istobechosenatrandom.Whatistheprobabilitythatthenumberchosenwillhave0
Asalespersonmadeaprofitof$50onthesaleofabicyclethatcostthesalesperson$180.Whatistheprofitexpressedasape
InABC,ABACandthemeasureof∠Bis34°.Whatisthemeasureof∠A?
Whichofthefollowingstatementsaretrue?(a)-5
Whichofthefollowingstatementsaretrue?(a)-5
AInthisquestionyouareaskedtocomparethepriceatwhichEmmasoldthebicyclewith$140.Fromtheinformationgiven,youc
AInthisquestionyouareaskedtocomparetheareaofrectangleAandtheareaofrectangleB.Sincetheinformationgivenrela
Matisse’sart,withitsspectacularimmediacyanditsmysteriousdepths,posesconfoundingproblemsforanalysisWhenHilarySpu
随机试题
下列关于合伙企业的财产说法错误的是
药物副作用
2岁奶牛,突然发病,腹围迅速增大,左肷窝明显突出,隆起高于髋结节。触诊左腹壁紧张而富有弹性,听诊瘤胃蠕动音消失;呼吸高度困难,张口喘气,每分钟呼吸数达83次;病牛惊恐不安,时而回头顾腹,时而后肢踢腹,起卧不安。很快出现眼结膜发绀,行走摇晃该病的治疗原则
女性患者,33岁,反复上腹部疼痛6年,多于每年秋季发生,疼痛多出现于餐前,进餐后可缓解,近日出现黑便,乏力,面色苍白,食欲尚好,体重无减轻。体检:轻度贫血貌,心肺及腹部查体未见明显阳性体征。Hb:100g/L,粪便隐血+++。该患诊断首先考虑
使胃蛋白酶原转变为胃蛋白酶的激活物是()。
燃油或燃气锅炉、油浸电力变压器、充有可燃油的高压电容器和多油开关等,宜设置在建筑外的专用房间内;当确需贴邻民用建筑布置,()。
在担保贷款中,担保企业作为第三者要以其信誉或财产对借款企业的还贷能力予以担保,因此,当借款企业不能按期偿还贷款本息时,担保企业就必须代为清偿。这样,会使借款企业放松管理,恶化经营管理状况。()
黑格尔在《美学》里指出:康德所理解的艺术美的内容与形式的统一“只存在于人的主观概念里”,席勒却能“把这种统一看做理念本身,认为它是认识的原则,也是存在的原则”。这就是说,席勒认识到这种统一体不只存在于主观的思维中,也存在于客观的存在中:“通过审美教育,就可
五十多年后回顾这段历史,杜老依然_______,然而他也没有_______土改实施过程中的缺陷,例如消灭富农和侵犯中农,以及没有严格依法保护劳动者财产利益。填入画横线部分最恰当的一项是()。
有三个关系R、S和T如下:由关系R和S通过运算得到关系T,则所使用的运算为()。
最新回复
(
0
)