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
Are you a social butterfly, or do you prefer being at the edge of a group of friends? Either way, your genes and evolution may p
Are you a social butterfly, or do you prefer being at the edge of a group of friends? Either way, your genes and evolution may p
admin
2010-12-04
33
问题
Are you a social butterfly, or do you prefer being at the edge of a group of friends? Either way, your genes and evolution may play a major role, US researchers reported on Monday.
While it may come as no surprise that genes may help explain why some people have many friends and others have few, the researchers said, their findings go just a little farther than that.
"Some of the things we find are frankly bizarre," said Nicholas Christakis of Harvard University in Massachusetts, who helped conduct the study.
"We find that how interconnected your friends are depends on your genes. Some people have four friends who know each other and some people have four friends who don’t know each other. Whether Dick and Harry know each other depends on Tom’s genes," Christakis said in a telephone interview.
Christakis and colleague James Fowler of the University of California San Diego are best known for their studies that show obesity, smoking and happiness spread in networks.
For this study, they and Christopher Dawes of UCSD used national data that compared more than 1,000 identical and fraternal twins. Because twins share an environment, these studies are good for showing the impact that genes have on various things, because identical twins share all their genes while fraternal twins share just half.
"We found there appears to be a genetic tendency to introduce your friends to each other," Christakis Said.
There could be good, evolutionary reasons for this. People in the middle of a social network could be privy to useful gossip, such as the location of food or good investment choices.
But they would also be at risk of catching germs from all sides-in which ease the advantage would lie in more cautious social behavior, they wrote in the proceedings of the National Academy of Sciences.
"It may be that natural selection is acting on not just things like whether or not we can resist the common cold, but also who it is that we are going to come into contact with," Fowler said in a statement.
Which word(s) in the passage can best replace the phrase "natural selection"?
选项
答案
Genes and evolution.
解析
本题可以说是一个主旨题。全文围绕的话题是:一个人的基因及进化过程决定了他的交际类型。首段提出了这个研究发现,第2段到倒数第2段对这一研究作了详细的说明,最后一段是结论,再次重申了这一观点。对比首末两段的内容就可以推断出末段的natural selection等同于首段的genes and evolution,它们都是决定一个人交际类型的因素。
转载请注明原文地址:https://kaotiyun.com/show/fds7777K
0
大学英语六级
相关试题推荐
Francemightbedescribedasan’all-round’country,onethathasachievedresultsofequalimportanceinmanydiversebranches
Webelievethat______.(那些在地震中幸存下来的人要比其他活着的人更珍惜生活)
AimlessnesshashardlybeentypicalofthepostwarJapanwhoseproductivityandsocialharmonyaretheenvyoftheUnitedStates
AimlessnesshashardlybeentypicalofthepostwarJapanwhoseproductivityandsocialharmonyaretheenvyoftheUnitedStates
Theageofgildedyouthisover.Today’sunder-thirtiesarethefirstgenerationforacenturywhocanexpectalowerlivingsta
A、Theoldhousesshouldbeturnedintostores.B、Thecityneedsevenmoremodernmodernization.C、Thisshoppingcenterisquite
Howmanypeoplearesufferingfromlabormarketproblems?Thisisoneofthemostcriticalyetcontentioussocialpolicyquestio
Millionsofyoungpeoplearecreatingblogs.Millionsofothersarereadingthem.Theword"blog"isashortwayofsayingWebl
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispart,youwillhave15minutestogooverthepassageq
A、Fortyhours.B、Lessthanfortyhours.C、Aboutseventyhours.D、Lessthantwenty-fivehours.B语义理解题。有些人的生活方式也许是以工作为主(bedominat
随机试题
Crohn病与肠结核最主要的鉴别在于()(1991年)
A.沉香B.川木通C.大血藤D.小通草E.苏木来源于毛茛科植物的药材是
洛夏墨迹试验属于
患者男性,83岁,肺部感染,为预防ARDS发生,下列措施不正确的是()
报检员何某因工作需要脱离了报检岗位,其所属企业应收回其报检员证交当地检验检疫机构,并以( )办理报检员证注销手续。
自20世纪80年代以来,我国金融监管体制的演变历程是由单一全能型体制转向()体制。
一般保证人不能行使先诉抗辩权的情形是()
习近平总书记指出:“中国共产党的中流砥柱作用是中国人民抗日战争胜利的关键。近代以后,中国人民历次反侵略战争失败的一个重要原因,是政治统治集团的腐朽无能和民族内部软弱涣散。中国共产党人以自己的政治主张、坚定意志、模范行动,支撑起全民族救亡图存的希望,引领着夺
下面程序段的功能是:在数据库中判断是否存在名为my_proc的存储过程,若存在,则删除之,然后创建同名的存储过程,该存储过程的功能是向author_id、author_name和address字段插入数据。阅读并回答以下问题:USEbookdb
RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,succe
最新回复
(
0
)