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
2015-01-31
69
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.
What is the most significant element for the increase in food production?
选项
A、Modern plant and animal breeding.
B、Efficient farming methods.
C、Environmental factors.
D、New irrigation system.
答案
A
解析
细节题。根据关键词“increase in food production”定位于第二段最后一句,“A lot of the increase in food production is attributed to…but the largest contributingfactor is modern plant and animal breeding.”粮食增产归功于高效的耕作方式和一些环境因素,但最重要的是现代动植物品种的繁殖,所以,正确答案是A。选项B、C为干扰项,都是原因,但不是主要的因素。
转载请注明原文地址:https://kaotiyun.com/show/Qth7777K
0
大学英语六级
相关试题推荐
A、Thewomandoesnotlikeit.B、Itisproducedbyweirdpeople.C、Onecanseealotofstrangethingsinit.D、Themanisdeterm
DoestheWorldFaceaFutureofWaterWars?[A]Throughouthistory,peoplehavefoughtbitterwarsoverpoliticalideology,natio
A、Theyseeagrowingmarketforprinters.B、Smallcompaniesneedmorehardcopies.C、Peopleareconcernedabouttheenvironment.
HowtoCreateaHomeLibrary[A]"Icannotlivewithoutbooks,"declaredU.S.PresidentThomasJeffersontohisfriendJohnAdam
Ahappymarriageapparentlyisgoodmedicine,buthostilespousesmaybeharmfultooneanother’shealth.Couplesinconflict-ri
Adultsaregettingsmarterabouthowsmartbabiesare.Notlongago,researcherslearnedthat4-day-oldcouldunderstand【B1】____
A、Salesmen.B、Managers.C、Customers.D、Researchers.B选项的内容表明,本题考查人物身份。由短文中提到的it’simportantforthemanagers…developeffectivema
Technology,Costs,LackofAppealSlowE-TextbookAdoption[A]TextbooksareoftenaluxuryforcollegeseniorVatellMartin.The
Inasense,thenewprotectionismisnotprotectionismatall,atleastnotinthe【C1】______senseoftheterm.Theoldprotectio
随机试题
马克思主义与中国实际相结合的第一次历史性飞跃的理论成果是
关于后穹隆穿刺正确的是()
下列哪种说法不正确
A.皮肤黏膜发红B.出现末梢性发绀C.口唇黏膜呈樱桃红色D.口吐白沫E.尿频阿托品中毒会出现()
东方印刷厂为增值税一般纳税人,主营书刊、写字本等印刷业务。2012年7月有关资料如下:(1)接受出版社和杂志社委托,自行购买纸张,印刷有统一刊号(CN)的图书和杂志。购买纸张取得的增值税专用发票上注明税额340000元,向各出版社和杂志社开具的增
2015年2月1日,新华社受权发布了指导“三农”工作的中央一号文件,文件题为《关于加大()力度加快农业现代化建设的若干意见》。
当太阳移动时,蜥蜴的部分肋骨就延长,使身体扁平并与太阳成直角。这种特殊性是由什么决定的?( )
契约自我执行有赖于完善的制度安排。中国悠久的商业传统不幸被计划经济_________,建设市场经济时日尚短,相关制度安排_________。在契约遭到违反时,必须有外部的调停者、仲裁者直至司法强制力来支持。填入划横线部分最恰当的一项是()
甲公司对乙公司的长期股权投资采用权益法进行核算,在下列情况下,甲公司需对“长期股权投资——乙公司”账户的账面余额进行调整的有()。
九届人大二次会议将党的十五大明确提出的何种基本方略写入了宪法?()
最新回复
(
0
)