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
考研
Being a man has always been dangerous. There are about 105 males born for every 100 females, but this ratio drops to near balanc
Being a man has always been dangerous. There are about 105 males born for every 100 females, but this ratio drops to near balanc
admin
2015-01-15
32
问题
Being a man has always been dangerous. There are about 105 males born for every 100 females, but this ratio drops to near balance at the age of maturity, and among 70-year-olds there are twice as many women as men. But the great universal of male mortality is being changed. Now, by babies survive almost as well as girls do. This means that, for the first time, there will be an excess of boys in those crucial years when they are searching for a mate. More important, another chance for natural selection has been removed. Fifty years ago, the chance of a baby(particularly a boy baby)surviving depended on its weight. A kilogram too light or too heavy meant almost certain death. Today it makes almost no difference. Since much of the variation is due to genes one more agent of evolution has gone.
There is another way to commit evolutionary suicide: stay alive, but have fewer children. Few people are as fertile as in the past. Except in some religious communities, very few women has 15 children. Nowadays the number of births, like the age of death, has become average. Most of us have roughly the same number of offspring. Again, differences between people and the opportunity for natural selection to take advantage of it have diminished. India shows what is happening. The country offers wealth for a few in the great cities and poverty for the remaining tribal peoples. The grand mediocrity of today everyone being the same in survival and number of offspring means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribes.
For us, this means that evolution is over; the biological Utopia has arrived. Strangely, it has involved little physical change. No other species fills so many places in nature. But in the past 100,000 years even the past 100 year our lives have been transformed but our bodies have not. We did not evolve, because machines and society did it for us. Darwin had a phrase to describe those ignorant of evolution: they "look at an organic being as savage looks at a ship, as at something wholly beyond his comprehension". No doubt we will remember a 20th century way of life beyond comprehension for its ugliness. But however amazed our descendants may be at how far from Utopia we were, they will look just like us.
Which of the following would be the best title for the passage?
选项
A、Sex Ratio Changes in Human Evolution
B、Ways of Continuing Man’s Evolution
C、The Evolutionary Future of Nature
D、Human Evolution Going Nowhere
答案
D
解析
从文章第1段的内容可知,如今,男婴和女婴的存活率几乎一样;这就意味着,自然选择的另一个偶然性已经被消除;因为大部分的变异是由基因引起的,所以进化的又一个因素不存在了。从第2段的内容可知,如今,几乎没有人像过去那样生殖力旺盛;现在,出生的人数已经平均化;每个人的寿命相同,所生的子女数量也一样;人与人之间的差别以及利用这种差别进行自然选择的良机都已经减少。从文章最后一段内容可知,对于我们来说,这意味着进化已经结束了;生物学上的理想境界已经来临;过去十万年——甚至过去一百年,我们的生活发生了变化,但我们的身体却没有改变;我们没有进化,因为机器和社会代替我们进化了;无论我们的后代感到多么惊奇,他们还是会看起来跟我们一样。据此可知,本文主要讲的是:由于一些进化因素的消失,人类的进化已经结束了。D项与文章的意思相符,因此D项为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/qchi777K
0
在职申硕(同等学力)英语
相关试题推荐
AThirteenhundredmedicalprofessionals,Ballofwhichhavebeentrainedtotreatdrugdependency,Cattendedtheannualconventi
Thefirststepbeforemakinganydecisionto______wastodetermineexactlywhodidthekilling.
Somepeoplefeelsadaboutglobalizationbecausetheybelieveitwill______Whatisthewriter’sattitudetowardsglobalizatio
"Businesscasual"wasprevalentseveralyearsagobecause______Itisimpliedinthepassagethatthechangeofbusinessdress
Customers(areasked)toensurethatthey(havegiven)correctchangebefore(leaving)theshopasmistakescannotbe(afterward
Wehavearesponsibilitytoensureournation’scontinuedprosperityandthemostsensiblewaytodothisisbyinvestmentinba
Woman:Now,Richard,wouldyoucaretoexplainhowtheanswerstothetestquestionsappearedonyourdesk?Man:Ican’t,Profes
Wefindthatbrightchildrenarerarelyheldbackbymixed-abilityteaching.Onthecontrary,boththeirknowledgeandexperienc
A."But"tokillbadthoughts.B.30,90,365.C.Onehabitfor30days.D.Consistencyiskey.E.Onehabitatatime.Habi
Emotionisafeelingaboutorreactiontocertainimportanteventsorthoughts.Peopleenjoyfeelingsuchpleasantemotionsasl
随机试题
下列属于证券经纪人的禁止行为的有()。I.采取贬低竞争对手、进入竞争对手营业场所劝导客户等不正当手段招揽客户Ⅱ.委托他人代理其从事客户招揽和客户服务等活动Ⅲ.为客户之间的融资提供中介、担保或者其他便利Ⅳ.向客
根据《企业所得税法》的规定,以下关于税收优惠的说法中正确的有()。
当今国际公认,被称为现代文明三大支柱的技术是()。
2016年1—5月份,全国规模以上工业企业实现利润总额23816.4亿元,同比增长6.4%,增速比1—4月份回落0.1个百分点。1—5月份,在规模以上工业企业中,国有控股企业实现利润总额4290.2亿元,同比下降7.3%;集体企业实现利润总额17
具有重要方法论意义的社会形态范畴是指()。
这些文学巨匠_______了古典主义、现实主义、人文主义等众多派别,他们的作品很直观地反映了由文艺复兴、工业革命所带来的法国文化的辉煌,也淋漓尽致地_______了社会的现实状况。填入画横线部分最恰当的一项是:
VisualBASIC应用程序通常由3类模块组成,即窗体模块、【】和类模块。
“商品”与“顾客”两个实体集之间的联系一般是
SoichiroHondaThefounderofHonda,SoichiroHondawasamechanicalengineerwithapassionformotorcycleandautomobiler
A、Shewasinterestedinlivingindifferentplaces.B、ShewantedtoknowmoreaboutJapaneseculture.C、Shewaspromotedbyher
最新回复
(
0
)