Since natural evolution is extremely slow and mankind’s selective production programs only take a few generations to produce a completely new species, natural evolution has already taken a back seat to mankind’s production programs. In addition, mankind has successfully killed off several species all together. For example, there are no more European wolves in existence and mammoths (猛犸象) probably died out because of mankind. Even certain diseases have been permanently got rid of from the planet, and dozens of other diseases will soon be too. Again, natural evolution did i»t cause most of the destruction during man’s rule of the world.
Currently, scientists are creating new species with desired characteristics in the lab significantly faster than natural evolution creates new species. In a single generation, new species can be created and destroyed by mankind, while natural evolution could take thousands of years to do the same but only accidentally. Scientists are even able to replace defective (有缺陷的) or damaged genes with different genes to attempt to cure genetic defects. This is something that natural evolution could possibly never correct.
Eventually scientists will even be able to improve the quality of people. For example, imagine not only correcting your eyesight with gene treatment, but also ensuring that all of your children do not receive your old genes of poor eyesight too. Scientists will one day be able to improve the memory and intelligence of your children, so that they will do better in school and achieve more in life. Doctors and scientists will be able to customize (订制) babies before they are born just like picking options at a car store.
【四川省成都市2016届高考英语阅读理解二轮提升训练(42)(含解析)】相关文章:
★ 贵州省贵阳市2014高考英语(新人教版)一轮阅读训练(20)附答案
★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文:体验真题(含解析)
★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文:应试策略(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(21)含答案
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习书面表达专题训练:技法7 画龙点睛的结束语(含解析)
★ 浙江省湖州市2014高考英语完形填空一轮(暑假)精炼(2)含答案
★ 山东省济宁市2016年高考英语复习:条件状语从句(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(1)含答案
★ 四川省成都市2016届高考英语阅读理解二轮提升训练(11)(含解析)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21