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
Clone Farm Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology
Clone Farm Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology
admin
2012-12-22
82
问题
Clone Farm
Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology needed to "clone" chickens on a massive scale. Once a chicken with desirable traits has been bred or genetically engineered, tens of thousands of eggs, which will hatch into identical copies, could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate, have the same amount of meat and taste the same.
This, at least, is the vision of the US’s National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $ 4.7 million to help fund research. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds.
That’s unlikely to put off the poultry industry, however, which wants disease resistant birds that grow faster on less food. "Producers would like the same meat quantity but to use reduced inputs to get there. " says Mike Fitzgerald of Origen. To meet this demand, Origen aims to "create an animal that is effectively a clone", he says. Normal cloning doesn’t work in birds because eggs can’t be removed and implanted. Instead, the company is trying to bulk-grow embryonic stem cells taken from fertilized eggs as soon as they’re laid. "The trick is to culture the cells without them starting to distinguish, so they remain pluripotent. " says Fitzgerald.
Using a long-established technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg, forming a chick that is a "chimera". Strictly speaking, a chimera isn’t a clone, because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if, 95 percent of a chicken’s body develops from donor cells. "In the poultry world, it doesn’t matter if it’s not 100 percent. " he says.
Another challenge for Origen is to scale up production. To do this, it has teamed up with Embrex, which produces machines that can inject vaccines into up to 50,000 eggs an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it.
In future, Origen imagines freezing stem cells from different strains of chicken. If orders come in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and it takes years to bread enough chickens to produce the billions of eggs that farmers need.
Which of the following statements about Origen and Embrex is correct according to the fifth paragraph?
选项
A、Origen and Embrex will jointly invent machines to increase production.
B、Origen wants to purchase an efficient donor cells injecting machine.
C、Origen has joined hands with Embrex in producing cell-injecting machines.
D、Origen is the leading company in producing embryo-locating machines.
答案
C
解析
根据第五段,Origen面临的另一大挑战是提升产量。为了能实现,它和生产将疫苗一小时内植入多达五万卵子的机器的Embrex合作。Embrex正在改进机器,使之定位胚胎,并将细胞准确送入但不会杀死胚胎,只有选项C,“Origen和Embrex合作生产植入卵子的机器”符合原文。
转载请注明原文地址:https://kaotiyun.com/show/9fUd777K
本试题收录于:
职称英语综合类A级题库职称英语分类
0
职称英语综合类A级
职称英语
相关试题推荐
RocketsintheSkyIfsomeoneaskedyou,"Whatcoloristhesky?"Iexpectthatyouwouldanswer,"Blue."Iamafraidthat
PlantsinDesertOnlyspecialplantscansurvivetheterribleclimateofadesert,fortheseareregionswheretheannualra
MusicandDrivingListeningtoloudmusicwhiledrivingcanseriouslyhamperreactiontimesandcauseaccidents,newresearc
WhatdoesProfessorLibbrechtbelievetobetrue?Whatdothesimplestsnowcrystalslooklike?
AIngvarKamprad-abornbusinessmanBSuccessbroughtbytheintroductionofshowroomsCTheoriginofIKEADSpecializationi
WeatherMapAweathermapisanimportanttoolforgeographers.Asuccessionofthreeoffourmapspresentsacontinuouspi
HowtoGetalongWellwithYourBoss1.Beforeyouarguewithyourboss,checkwiththeboss’ssecretarytodeterminehismood
Evenbeforemodernnotionsoffriction,itwasknownthatgreasedsurfacesmoveoveroneanothermoreeasilythandryones.
A.ReasonfornaminghurricanesB.WarningofanapproachinghurricaneC.DeadlywomenD.HistoryofnaminghurricanesE.Organi
Someabnormalhumanbehaviormaybecausedbyeatingsubstancesthatupsetdelicatechemicalbalancesinthebrain.
随机试题
良、恶性肿瘤最有鉴别价值的是
A.疔B.流注C.有头疽D.附骨疽E.无头疽痈是多个相邻毛囊及其所属皮脂腺或汗腺的急性化脓性感染,或由多个疖融合而成,相当于中医学的
患者腹大胀满不舒,早宽暮急,面色苍黄,嗜睡,语无伦次,逐渐昏迷,舌苔灰腻,脉弦细而滑,治疗应首选()
(2009年)在低碳钢拉伸实验中,冷作硬化现象发生在()。
(2013年)2012年3月1日,甲公司外购一栋写字楼直接租赁给乙公司使用,租赁期为6年,每年租金为180万元。甲公司对投资性房地产采用公允价值模式进行后续计量。该写字楼的买价为3000万元;2012年12月31日,该写字楼的公允价值为3200万元。假设不
下列各项中,属于会计估计变更的有()。
Curiously,forapublicationcalledanewspaper,noonehasevercoinedastandarddefinitionofnews.Butforthemostpart,ne
下列属于纠错码的是(62)。
S12厂生产中所需的零件可以存放在多个仓库中,而每一仓库中可存放多种零件。则实体仓库和零件间的联系是
Perhaps(31)arefarmorewivesthatIimaginewhotakeitfor(32)thathouseworkisneithersatisfyingnorevenimportantonce
最新回复
(
0
)