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
92
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 institution has offered $ 4.7 million to fund the research?
选项
A、The US’s National Institute of Science and Technology.
B、Origen therapeutics of Burlingame, California
C、Embrex of North Carolina
D、Animal welfare groups.
答案
A
解析
第二段开始就提到: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.因此答案选A。
转载请注明原文地址:https://kaotiyun.com/show/1fUd777K
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
PlantsinDesertOnlyspecialplantscansurvivetheterribleclimateofadesert,fortheseareregionswheretheannualra
StopSpamWhenIfirstgotane-mailaccounttenyearsago,Ireceivedcommunicationsonlyfromfamily,friends,andcolleagu
AIngvarKamprad-abornbusinessmanBSuccessbroughtbytheintroductionofshowroomsCTheoriginofIKEADSpecializationi
AIngvarKamprad-abornbusinessmanBSuccessbroughtbytheintroductionofshowroomsCTheoriginofIKEADSpecializationi
FinancialRisksSeveraltypesoffinancialriskareencounteredininternationalmarketing;themajorproblemsincludecommercia
FinancialRisksSeveraltypesoffinancialriskareencounteredininternationalmarketing;themajorproblemsincludecommercia
Itispostulatedthatpopulationtrendshaveaneffectoneconomicfluctuations.
AMostImportantPeriodinGreekOneofthemostimportantperiodsinGreekhistorywastheHellenisticAgewhichbeganaft
AMostImportantPeriodinGreekOneofthemostimportantperiodsinGreekhistorywastheHellenisticAgewhichbeganaft
Shereadapoemwhichdepictsthesplendorofthesunset.
随机试题
A.白芷B.巴戟天C.山药D.天花粉E.浙贝母图16所示药材是()。
应诊断为最好的治疗方法是
某钢筋混凝土现浇肋形楼盖的次梁,跨中承受最大正弯矩设计值M=115kN.m。混凝土强度等级为C30,纵向受拉钢筋采用热轧HRB335钢筋。楼板厚度ht’=80mm,次梁高度h=450mm,宽度b=200mm,纵向受力钢筋合力点至混凝土边缘的距离as=35m
监理工程师对施工质量的检查与验收,必须是在承包单位()的基础上进行。
下列各项中,属于土地增值税征税范围的是()。
数据传输单元一般是由有线收发模块组成,负责数据的接收和发送。()
根据学生的成绩在班级中的相对位置和名次,确定学生的成绩在该班属于“优”、“中”或“差"的教学评价属于()。
亚历山大大帝有一次大送礼物,表示他的慷慨。他给了甲一大笔钱,给了乙一个省份,给了丙一个高官。他的朋友听到这件事后,对他说:“你要是一直这样做下去,你自己会一贫如洗。”亚历山大回答说:“我哪会一贫如洗,我为我自己留下的是一份最伟大的礼物。我所留下的是我的希望
如图所示,三个圆的半径均为a,三个圆两两相交于圆心,则图中阴影部分的面积为().
长镜头(中传2009年研)
最新回复
(
0
)