首页
登录
职称英语
In recent years a new farming revolution has begun, one that involves the【C1
In recent years a new farming revolution has begun, one that involves the【C1
游客
2023-07-17
58
管理
问题
In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level--the gene. The study of genetics has【C2】______a new industry called biotechnology. As the name suggest, it【C3】______biology and modern technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to【C4】______seeds that give a high yield, that【C5】______diseases, drought and frost, and that reduce the need for【C6】______chemicals. If such goals could be achieved, it would be most【C7】______. But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain【C8】______. A rose can be crossed with different kind of rose, but a rose will never cross with a potato. Genetic engineering,【C9】______usually involves taking genes from one species and inserting them into another【C10】______to transfer a desired characteristic. This could mean, for example, selecting a gene which leads to a production of a chemical with anti-freeze【C11】______from an arctic fish, and inserting it into a potato or strawberry to make it frost-resistant.【C12】______, then, biotechnology allows humans to【C13】______the genetic walls that separate species.
Like the green revolution,【C14】______some call the gene revolution contributes to the problem of genetic uniformity--some say even more so【C15】______geneticists can employ techniques such as cloning and【C16】______culture (培养), processes that produce perfectly【C17】______copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new【C18】______such as the effects that they may have on us and the environment. "We are flying blindly into a new【C19】______of agricultural biotechnology with high hopes, few constraints, and little idea of the potential【C20】______," said science writer Jeremy Rifkin. [br] 【C12】
选项
A、In essence
B、In part
C、In advance
D、In return
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2845100.html
相关试题推荐
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Farewell,Libraries?Amazon,corn’srecentannounc
随机试题
Povertyexistsbecauseoursocietyisanunequalone,andtherearepowerful
Whatisthemainmessageofthenewsitem?[originaltext]RussianForeignMin
Thelawrequiresthatfurscarrya______.[br]Inthearticle,theauthorsaysa
WhenItrytounderstand______thatpreventssomanyAmericansfrombeingasha
下列哪项不属于胆囊收缩素的作用()A.促进胰液分泌 B.促进食管一胃括约肌
老林和小陈绕着周长为720米的小花园匀速散步,小陈比老林的速度快。若两人同时从某
请简述效度的类型及其估计方法。
下列方法中,简便易行且主要适用于短期预测的人力资源需求预测方法是()。A.
关于财政政策的基本功能的说法,正确的是()。A.导向功能 B.协调功能
在工程总成本一开始估计不准,可能变化不大的情况下,可采用的合同形式是()A.成
最新回复
(
0
)