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
38
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] 【C8】
选项
A、lines
B、limits
C、space
D、ages
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2845096.html
相关试题推荐
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Inadditiontovisibletrade,whichinvolvestheimportandexportofmercha
Recentresearchhasclaimedthatanexcessofpositiveions(离子)intheair
Recentresearchhasclaimedthatanexcessofpositiveions(离子)intheair
Recentresearchhasclaimedthatanexcessofpositiveions(离子)intheair
Recentresearchhasclaimedthatanexcessofpositiveions(离子)intheair
随机试题
ConservativecommentatorCharlesKrauthammer’snewbookisflyingoffthesh
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinked
Thatourenvironmenthaslittletodowithourabilities,charactertraitsandb
甲公司为一家中国企业,拟收购欧洲乙公司100%股权。经评估,乙公司的评估价值为1
私人参与公共产品生产和提供的必要条件不包括( )。A.“免费搭车” B.“政
两组计数资料的χ检验要求A.N≥40.T≥5 B.N≥40,1≤T≤5 C.
苯急性毒作用主要影响A.消化系统 B.呼吸系统 C.内分泌系统 D.造血系
《期货交易管理条例》第六十九条规定,期货交易内幕信息的知情人在对期货交易价格有重
六腑中,“主津”的是A.胆 B.胃 C.小肠 D.大肠 E.膀
下列筹资工具中,发行企业可能在债券筹资基础上同时实现普通股筹资的是()。A.可
最新回复
(
0
)