首页
登录
职称英语
Genetic Engineering is a radical and rapidly developing technology that touc
Genetic Engineering is a radical and rapidly developing technology that touc
游客
2024-03-12
75
管理
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. [br] What is the main difference between Genetic Engineering and traditionally bred foods?
选项
A、The difference lies in the methods and the number of genes.
B、They have different size and color.
C、Traditional methods are not attracted by consumers.
D、Genetic Engineering is more efficient.
答案
A
解析
细节题。原文第四段第二句与第三句,明确指出传统繁殖和转基因食品的差异在于对特定遗传因子的直接改良或操作。传统的方法将数千种遗传因子混在一起.而遗传改良则把一个或少量的遗传因子注入体内。可知应选A,在方法和基因的数量上有差别。
转载请注明原文地址:http://tihaiku.com/zcyy/3526263.html
相关试题推荐
GeneticEngineeringisaradicalandrapidlydevelopingtechnologythattouc
GeneticEngineeringisaradicalandrapidlydevelopingtechnologythattouc
DNAfingerprintingisusedtodeterminewhereparticulargeneticmaterialca
DNAfingerprintingisusedtodeterminewhereparticulargeneticmaterialca
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
EducatingPsychebyBernieNevilleisabookwhichlooksatradicalnewappr
EducatingPsychebyBernieNevilleisabookwhichlooksatradicalnewappr
EducatingPsychebyBernieNevilleisabookwhichlooksatradicalnewappr
随机试题
Abroadpublicdiscussionofenvironmentalproblemsbeganinthemid-1980s,
Itiscommonlysupposedthatwhenamanseeksliterarypowerhegoestohi
循行于腹中线旁开2寸,胸中线旁开4寸的经脉是A.手太阴肺经 B.足阳明胃经
IT运营的应急计划应该包括适当的备份协议。当重要的操作需要立即获得计算机资源时,
应急演练按照演练内容分为()。A.现场演练和桌面演练 B.现场演练和单项
下列关于每股收益的说法正确的有( )A.对亏损企业,稀释性潜在普通股如当期转为
医院内获得性肺炎,最常见的致病菌是A.革兰阴性杆菌 B.肺炎球菌 C.厌氧菌
情志致病初期多易导致A.卫分为病 B.血分为病 C.气分为病 D.冲任为病
我国科学家发明的鹤草酚的药理作用是A.抗绦虫药 B.抗疟疾药 C.抗滴虫药
(2019年真题)根据政府采购法律制度的规定,下列各项中,属于供应商应当具备的条
最新回复
(
0
)