首页
登录
职称英语
There are about 105 males born for every 100 females, but this【B1】______ dr
There are about 105 males born for every 100 females, but this【B1】______ dr
游客
2024-06-02
1
管理
问题
There are about 105 males born for every 100 females, but this【B1】______ 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【B2】______ is being changed. Now, boy babies【B3】______ almost as well as girls do. Fifty years ago, the chance of a baby(particularly a boy baby)surviving depended on its weight. A kilogram too light or too heavy【B4】______ almost certain death. Today it makes almost no【B5】______ . Since much of the variation is due to genes, one more agent of evolution has gone.
There is another way to【B6】______ evolutionary suicide: stay alive, but have fewer children. Few people are as【B7】______ as in the past. Nowadays the number of births, like the age of death, has become 【B8】______ .Again,【B9】______ .
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.【B10】______ . 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 re- member a 20th century way of life beyond comprehension for its ugliness.【B11】______ . [br] 【B9】
选项
答案
differences between people and the opportunity for natural selection to take advantage of it have diminished
解析
[Main Points differences between people and the opportunity for natural selection have diminished
转载请注明原文地址:https://tihaiku.com/zcyy/3615738.html
相关试题推荐
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
随机试题
Moststudentsthinkofthelibraryonly【C1】______aplacewherebooksares
[audioFiles]audio_eufm_j63_001(20082)[/audioFiles]A、Chickenistasty.B、Roastb
根据我国商标法,下列商品中必须使用注册商标的是()。A.医疗仪器 B.墙壁
在中国古代四大发明向西方传播过程中,贡献最大的是_____。A.意大利传教士
A.牵牛子苷B.巴豆油C.芫花酯甲D.硫酸钠E.番泻苷A可用于终止妊娠的成分是
下列关于药效学指标说法正确的是A.药效学指标必须在个体内有良好的重复性,而对个体
提出“自然教育”思想的代表人物是( )A.狄德罗 B.爱尔维修 C.卢梭
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
某已建成项目规模为20万吨/年,生产装置投资5000万元,厂房投资1000万元,
下列自动喷水灭火系统中,适用于环境温度低于4℃且采用闭式喷头的是()。A.
最新回复
(
0
)