首页
登录
职称英语
Being a man has always been dangerous. There are about 105 males born for e
Being a man has always been dangerous. There are about 105 males born for e
游客
2024-06-03
23
管理
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 boy 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 have 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 cites 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 Indian compared with other 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 years--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 a 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. [br] The author argues that our bodies have stopped evolving because ______.
选项
A、life has been improved by technological advance
B、the number of female babies has been declining
C、the difference between wealth and poverty is disappearing
D、our species has reached the highest stage of evolution
答案
A
解析
细节推断题。文章第三段第四和第五句提到近一百年来我们的生活发生了巨大的变化,而我们的身体没有任何变化,因为机器和社会替我们做了进化该做的事。因此可以推断人类停止进化的原因是技术进步改善了人类的生活并帮助人类不断适应环境的变化,故正确答案为A项。
转载请注明原文地址:https://tihaiku.com/zcyy/3617412.html
相关试题推荐
Beingamanhasalwaysbeendangerous.Thereareabout105malesbornfore
[originaltext]Asatradition,workersincompaniesarealwaysrequiredtow
[originaltext]W:Ihatewinterhere.It’salwayssocold,yetwehardlygetany
[originaltext]W:Ihatewinterhere.It’salwayssocold,yetwehardlygetany
[originaltext]W:Ihatewinterhere.It’salwayssocold,yetwehardlygetany
[originaltext]W:Ihatewinterhere.It’salwayssocold,yetwehardlygetany
[originaltext]W:Ihatewinterhere.It’salwayssocold,yetwehardlygetany
[originaltext]Haveyoualwayswantedtoinvest,butdidn’tknowwheretog
[originaltext]Haveyoualwayswantedtoinvest,butdidn’tknowwheretog
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
随机试题
MostpeoplesaythattheUSAismakingprogressinfightingAIDS,butthey
GadgetswithaSportingChanceConsumerelectronics:
[originaltext]M:NowI’lltakesomequestions.W:Well,Mr.Brown,Ihaveaque
说明:假定你是胡斌,根据下列内容写一封邮件。发信人E—mail地址:hubin@163.com收信人E-mail地址:KPOHsales@—hotmail.
消防水泵自动巡检时,巡检周期应为7d,不得按随意设定。
A.1∶3∶1 B.2∶3∶1 C.2∶2∶1 D.1∶3∶3
赵先生46岁,身高170Cm,体重80kg,证券公司部门经理,在某健康管理中心要
具有神经肌肉阻滞作用,使虫体痉挛性麻痹的是()A:甲苯咪唑 B:伊维菌素
以下心些可以作为相对估值法的指标()。 Ⅰ.市盈率 Ⅱ.市净率 Ⅲ.销售
1.题目:语法教学 2.内容: 3.基本要求: (1)试讲时间约10分
最新回复
(
0
)