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
What has cloning bypassed?
What has cloning bypassed?
admin
2014-09-27
36
问题
What has cloning bypassed?
Questions 11 — 13 are based on the following talk about cloning.
What is cloning? Cloning is the creation of cells or whole animals using DNA from a single "parent", by passing the normal reproductive process. The clone has the same DNA as the parent.
The most common process takes DNA from one cell and puts it into a hollowed-out egg. Chemicals and electricity are then used to encourage the new DNA to fuse with the egg and develop into an embryo. This technique is called nuclear transfer.
The first cloned animal in human history is a sheep called Dolly. It is very important because it was the first mammal to be cloned using DNA taken from an adult cell. Previously, animals had only been cloned using embryo cells, which already have the potential to become a complete embryo in its own right. The big breakthrough with Dolly was to make a clone from an ordinary, adult cell.
When it comes to the question of whether cloned animals are normal and healthy, the answer is YES. Dolly is, but scientists do not yet know whether this is the exception or the rule. Some early evidence suggests that clones may have health problems and that they may age prematurely.
With the birth of Dolly, many people are worried that a human clone may be born soon. It’s possible in theory. But the technology of reproductive cloning is still in its very early stages and there is much that scientists do not understand. What’s more, human cloning is already banned by law in the United Kingdom. The former President of the United States Bill Clinton proposed banning research into producing human clones in the US for five years. Some measures have also been taken to establish international agreements banning live human clones.
选项
A、It makes a clone from an ordinary, adult cell.
B、It makes the first normal and healthy cloned animal.
C、It paves the way to the cloning of human beings.
D、It makes a cloned animal with only mother.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/j9Rd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Thereaxevariouswaysinwhichindividualeconomicunitscaninteractwithoneanother.Threebasicwaysmaybedescribedasth
Whoeversaidthatvictoryhasmanyfathersanddefeatisanorphan,surelyhadneverheardoftheWorldTradeOrganization(WTO)
Helandedinthiscountrywhenhewas4yearsoldwithoutawordofEnglish,andtherehehasrecentlygraduatedwithhonorsf
Wheredoesthemoneyforpublicschoolscomefrom?
Everyday,thousandsofmanagers,bankers,sales-executives,lawyers,accountants,andotherprofessionalsaredriventoangera
Thecaseforcollegehasbeenacceptedwithoutquestionformorethanageneration.61)Allhighschoolgraduatesoughttogo,s
Itwasnot"thecometofthecentury"expertspredicteditmightbe.However,Kohoutekhasprovidedabonanzaofscientificinfo
Jewish独白第一句话即用ofJewishnationality(犹太民族)说明了基辛格的民族。注意nationality在此不是“国籍”,因为在Germany下面的Birthplace(出生地)一栏中出现了。另外,考生应注意表格中的信息顺序并不是材
Everyoneknowsthattaxationisnecessaryinamodernstate:【21】______it,itwouldnotbepossibletopaythesoldiersand
Thursday最后一个话轮交代了男士给出结果的时间:YoumaycallmeonThursdaynight,考生只要听清了这一句即可作答。
随机试题
甲市乙区公安分局所辖派出所以李某制造噪声干扰他人正常生活为由,处以500元罚款。李某不服申请复议。下列机关中可以成为本案复议机关的是()。
平胃散的功用是
在过去的几年里我国已取得了举世瞩目的卫生成就。其中,三级医疗卫生保健网发挥了重要作用。其设立的三条系统是
原告是外国的公民、法人或者其他组织的案件由()管辖。
采用会计核算软件编制记账凭证时,凭证编号由计算机自动产生,不可以由手工输入。()
专题报告反映的内容不包括()。
甲公司在编制2×17年度财务报表时,发现2×16年度某项管理用无形资产未摊销,应摊销金额20万元,甲公司将该20万元补记的摊销额计入了2×17年度的管理费用。甲公司2×16年和2×17年实现的净利润分别为20000万元和18000万元。不考虑其他因素,甲公
公用事业的收费标准应尽量做到政府不补贴,也不多赚钱。但由于缺乏竞争市场,这一点很难做到。有一些公用事业带有服务性质,或者为了照顾低收入阶层,收费较低甚至免费,成本由全体纳税人负担。对以上文字理解正确的是()。
西方货币政策传导机制理论中,用P→W→C→Y表示财富传导机制的传导过程,其中的C表示的是()。
Theriseofmultinationalcorporations,globalmarketing,newcommunicationstechnologies,andshrinkingculturaldifferencesha
最新回复
(
0
)