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
Genetic Engineering is a radical and rapidly developing technology that touches our lives through its application in medicine, f
Genetic Engineering is a radical and rapidly developing technology that touches our lives through its application in medicine, f
admin
2014-12-26
94
问题
Genetic Engineering is a radical and rapidly developing technology that touches our lives through its application in medicine, forensics, industry and agriculture. Through this science humans are fast in becoming the architects of life but there are those who warn against the unknown dangers of playing God while others see its benefits in our fight against disease and the production of abundant food supplies.
In the past 50 years, plant and animal production has increased dramatically. Today, the human population is the largest it has ever been and fortunately we produce more food per capita than ever before. Despite the fact that we have enough food for every single human being to have an adequate diet, about 1 billion people still suffer from malnutrition and hunger. A lot of the increase in food production is attributed to efficient farming methods and environmental factors such as irrigation, pest and weed control but the largest contributing factor is modern plant and animal breeding.
So what are GM foods and what are the concerns for the consumer? The main difference between GM foods and traditional breeding methods is the direct modification or manipulation of certain genes. Traditional methods involve mixing thousands of genes whereas genetic modification allows just one individual gene, or a small number of genes, to be inserted into a plant, or animal.
The benefits of GM foods are enormous. Genetic modification can be used to give crops immunity to plant viruses or to improve the nutritional value of a plant. In animals intended for food, genetic modification could potentially increase how fast and how big they grow. Starvation on any part of the planet could be a thing of the past as we could control the yield, varieties and size of foods and produce strains that are resistant to pests, are extreme in temperature and are tolerant to herbicides.
Opponents of GM foods however consider their production to be the world’s biggest uncontrolled biological experiment, a disaster waiting to happen. The biggest concerns are the effects that an uncontrolled genetically modified species could potentially have on human and animal health, agriculture, and on the environment as a whole. Genetically modified species have the potential to become biological pollutants that are far worse than chemical pollutants as they would be virtually impossible to control since they are alive, migrate and could mutate producing even more dangerous offspring. This could lead to irreversible damage to the ecology of the planet.
Why does the author claim that starvation could be a thing of the past in paragraph 4?
选项
A、Because GM is immune to plant viruses.
B、The temperature can be modified by scientists.
C、Scientists will be able to control the size, variety and immunity of crops and animals.
D、People are easily accessible to food nowadays.
答案
C
解析
细节题。原文第四段最后一句,明确指出“Starvation on any part of theplanet…and are tolerant to herbicides.”由于可以控制食品的生产量、变种、规格等,生产出抗虫性强,耐温性强、耐除草剂的物种,饥饿便不复存在了。选项C与原文大意相符。
转载请注明原文地址:https://kaotiyun.com/show/h6h7777K
0
大学英语六级
相关试题推荐
Thepurposeofaletterofapplicationistohelpyouto"sell"yourself.Itshouldstateclearlythejobyouwant,andshouldt
Thepurposeofaletterofapplicationistohelpyouto"sell"yourself.Itshouldstateclearlythejobyouwant,andshouldt
Thepurposeofaletterofapplicationistohelpyouto"sell"yourself.Itshouldstateclearlythejobyouwant,andshouldt
Lastweek,speakersataprograminWashingtondiscussedusingnanotechnology(纳米技术)toimprovehealthcareindevelopingcountrie
Lastweek,speakersataprograminWashingtondiscussedusingnanotechnology(纳米技术)toimprovehealthcareindevelopingcountrie
AnewstudysaysancientsnowontopofMountKilimanjaroinTanzaniacouldbegoneinabout20years.Hugelayersoficeformed
AnewstudysaysancientsnowontopofMountKilimanjaroinTanzaniacouldbegoneinabout20years.Hugelayersoficeformed
AnewstudysaysancientsnowontopofMountKilimanjaroinTanzaniacouldbegoneinabout20years.Hugelayersoficeformed
AnewstudysaysancientsnowontopofMountKilimanjaroinTanzaniacouldbegoneinabout20years.Hugelayersoficeformed
随机试题
3岁犬,精神沉郁、食欲减退,黏膜轻度发绀,听诊发现第二心音性质显著改变,其原因是
斜刺的角度应为
()是以征收范围内的土地为征税对象,以实际占用的土地面积为计税依据,按规定税额对拥有土地使用权的单位和个人征收的一种税。
在一般情况下,向海关申请担保的担保期不得超过()。
缺陷补偿是指个体在充当社会角色时不可能事事成功,当自我角色目标失败时,常常可能会对相关的社会角色的重要性做重新评价,从而进行自我定义以补偿自己角色缺陷。根据上述定义,下列属于缺陷补偿的是()。
下列权利中不属于绝对权的是()。
若正项级数
About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof.Butwhentheannualgamesforthedisabledwere
We’veallhadworkanddothingsthatwedidnotenjoy.Usually,somepeoplewouldtellustobe【C1】______enthusiastic(热情的)."Yo
Aschildrenwestart【C1】______anaturalcuriosityabouteverythingaroundus,andduringthematurationprocessthiscuriosityc
最新回复
(
0
)