首页
登录
职称英语
The study of genetics has given rise to a profitable new industry called bio
The study of genetics has given rise to a profitable new industry called bio
游客
2025-03-27
22
管理
问题
The study of genetics has given rise to a profitable new industry called biotechnology. As the name suggests, it blends biology and modem technology through such techniques as genetic engineering. Some of the new biotech as they are called, specialize in agriculture and are working enthusiastically to patent seeds that give a high yield, that resist disease, drought, and frost, and that reduce the need for hazardous chemicals. If such goals could be achieved, it would be most beneficial. But some have raised concerns about genetically engineered crops.
"In nature, genetic diversity is created within certain limits," says the book Genetic Engineering, Food, and Our Environment. "A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, on the other hand, usually involves taking genes from one species and inserting them into another in an attempt to transfer a desired property or character. This could mean, for example, selecting a gene which leads to the production of a chemical with antifreeze properties from an arctic fish, and joining it into a potato or strawberry to make it frost-resistant. It is now possible for plants to be engineered with genes taken from bacteria, viruses, insects, animals or even humans." In essence, then, biotechnology allows humans to break the genetic walls that separate species.
Like the green revolution, what some call the gene revolution contributes to the problem of genetic uniformity—some say even more so because geneticists can employ techniques such as cloning and tissue culture, processes that produce perfectly identical copies, or clones. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new issues, such as the effects that they may have on us and the environment. "We are flying blindly into a new era of agricultural biotechnology with high hopes, few constraints, and little idea of the potential outcomes," said science writer Jeremy Rifkin. [br] The author’s attitude towards genetic engineering can best be described as______.
选项
A、optimistic
B、pessimistic
C、concerned
D、suspicious
答案
C
解析
从最后一段可以看出,作者是很关注基因工程技术应用的。
转载请注明原文地址:https://tihaiku.com/zcyy/4014825.html
相关试题推荐
Thestudyofgeneticshasgivenrisetoaprofitablenewindustrycalledbio
Thestudyofgeneticshasgivenrisetoaprofitablenewindustrycalledbio
Thestudyofgeneticshasgivenrisetoaprofitablenewindustrycalledbio
Thestudyofgeneticshasgivenrisetoaprofitablenewindustrycalledbio
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[br][originaltext]
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[br][originaltext]
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[br][originaltext]
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[originaltext]Un
[originaltext]Anewbookcalled"BattleHymnoftheTigerMother"byAmyWa
Astheso-calleddebateoverhealthcarecontinuesintheSenate,letmetake
随机试题
顺其自然beinaccordancewithnature
[originaltext]Historically,thecorrelationbetweeneducationandincomeha
甲公司是一家在境内、外上市的综合性国际能源公司。2011年6月30日,甲公司决定
—束自然光通过两块叠放在一起的偏振片,若两偏振片的偏振化方向间夹角由α1转到α2
学习完鲁迅的《记念刘和珍君》后,学生对修辞手法的使用产生了浓厚的兴趣,教师引导学
作为一名幼儿教师,必须保持一颗(),因为它是教师通往每个孩子心灵的桥梁。A.耐心
某商场建筑高度25m,每层建筑面积1200m2。下列关于其消防用水设施的设置,符
以下不属于市场风险的是( )。A.利率风险 B.汇率风险 C.法律风险
7月1日,某交易所的9月份大豆合约的价格是2000元/吨,11月份大豆合约的价格
关于散剂特点与分类的说法,错误的是A.易吸湿或易氧化变质的药物、刺激性大的药物、
最新回复
(
0
)