试题查看

首页 > 公共英语考试 > 试题查看
【单选题】

whilE it’s truE thAt just ABout EvEry CEll in thE BoDy hAs thE instruCtions to mAkE A ComplEtE humAn, most oF thosE instruCtions ArE inACtivAtED, AnD with gooD rEAson. thE lAst thing you wAnt is For your BrAin CElls to stArt proDuCing stomACh ACiD or your nosE to turn into A kiDnEy. thE only timE CEils truly hAvE thE potEntiAl to turn into Any AnD All BoDy pArts is vEry EArly in A prEgnAnCy, whEn so-CAllED stEm CElls hAvEn’t BEgun to spECiAlizE.
yEt this untAppED potEntiAl CoulD BE A tErriFiC Boon to mEDiCinE. most DisEAsEs involvE thE DEAth oF hEAlthy CElls--BrAin CElls inAlzhEimEr’s, CArDiAC CElls in hEArt DisEAsE, pAnCrEAtiC CElls in DiABEtEs, to nAmE A FEw. iF DoCtors CoulD isolAtE stEm CElls, thEn DirECt thEir growth, thEy might BE ABlE to Furnish pAtiEnts with hEAlthy rEplACEmEnt tissuE. it wAs inCrEDiBly DiFFiCult, But lAst FAll sCiEntists At thE univErsity oF wisConsin mAnAgED to isolAtE stEm CElls AnD gEt thEm to grow into nEurAl, musClE AnD BonE CElls. thE proCEss still CAn’t BE ControllED, AnD mAy hAvE unForEsEEn limitAtions.But iF EFForts to unDErstAnD AnD mAstEr stEm-CEll DEvElopmEnt provE suCCEssFul, DoCtors will hAvE A thErApEutiC tool oF inCrEDiBlE powEr.
thE sAmE AppliEs to Cloning, whiCh is rEAlly just thE othEr siDE oF thE Coin. truE Cloning, As First shown withDolly thE shEEp two yEArs Ago, involvEs tAking A DEvElopED CEll AnD rEACtivAting thE gEnomE within, rEsEtting its DEvElopmEntAl instruCtions to A pristinE stAtE. onCE thAt hAppEns, thE rEjuvEnAtED CEll CAn DEvElop into A Full-FlEDgED AnimAl, gEnEtiCAlly iDEntiCAl to its pArEnt.
For AgriCulturE, in whiCh purEly physiCAl ChArACtEristiCs likE milk proDuCtion in A Cow or low FAt in A hog hAvE rEAl mArkEt vAluE, BiologiCAl CArBon CopiEs CoulD BEComE routinE within A FEw yEArs. this pAst yEAr sCiEntists hAvE DonE For miCE AnD Cows whAt iAn wilmut DiD ForDolly, AnD othEr CrEAturEs ArE BounD to join thE ClonED mEnAgEriE in thE Coming yEAr.
humAn Cloning, on thE othEr hAnD, mAy BE tEChniCAlly FEAsiBlE But lEgAlly AnD EmotionAlly morE DiFFiCult. still, onE DAy it will hAppEn. thE ABility to rEsEt BoDy CElls to A pristinE, unDEvElopED stAtE CoulD givE DoCtors ExACtly thE sAmE ADvAntAgEs thEy woulD gEt From stEm CElls: thE potEntiAl to mAkE hEAlthy BoDy tissuEs oF All sorts, AnD thus to CurE DisEAsE. thAt CoulD provE to BE A trEE "mirAClE CurE".
thE Author woulD most likEly AgrEE with whiCh oF thE Following stAtEmEnts
A、humAn Cloning is A tEChniCAl impossiBility.
B、humAn Cloning mAy CAusE EthiCAl ConCErns.
C、Cloning ContriButEs to unDErstAnDing oF stEm CElls.
D、thE potEntiAl mEDiCAl vAluEs oF Cloning hAvE BEEn ExAggErAtED、

查看答案解析

参考答案:

正在加载...

答案解析

正在加载...

如答案有误或试题有侵权,请联系我们。[提交反馈][在线客服]

根据网考网移动考试中心的统计,该试题:

18%的考友选择了A选项

67%的考友选择了B选项

0%的考友选择了C选项

15%的考友选择了D选项

你可能感兴趣的试题

Whileit’struethatjustabouteverycellintheInordertobeabletogivethecustomer15percenForImmanuelKant.theEnlightenmentcouldbecLetter-writinggoesbackthousandsofyearsbuWhileit’struethatjustabouteverycellintheItisimpossibleforthecustomertogetafurthe
版权所有网考网(netkao.com)All Rights Reserved

警告:系统检测到您的账号存在安全风险

抱歉,您的账号因涉嫌违反网考网购买须知被冻结。您可在“网考网” 微信公众号中的“官网服务”- "账号解封申请”申请解封。

微信扫描关注网考网