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
2024-02-18
45
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] 【C18】
选项
A、issues
B、height
C、difficulties
D、goals
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3461370.html
相关试题推荐
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywi
随机试题
GoingInternationalAmericanbusinessesarepartofaglobaleconomyr
TRACTABILITY:A、doubtfulnessB、impassabilityC、sterilityD、persistenceE、uselessn
ForeightyearstheClintonAdministrationpreachedtheneedforexquisitese
[originaltext]M:Ineedtocashthischeck.W:Willyoustepovertotheteller
不属于数字出版产业范畴的是( )。A.电子书 B.网络游戏 C.数字音乐
设备费的构成为( )。A.设备原价、运输费、装卸费和运输保险费 B.设备原价
下列目标是小班年龄阶段健康教育目标的是()。A.学会洗手、洗脸、整理衣物 B.
A.12kg、85cm B.14kg、105cm C.16kg、110cm
下列表述会计职业道德修养的环节正确的是()。A、形成正确的会计职业道德认知 B
A.红细胞膜上含A凝集原,血清中含抗A凝集素 B.红细胞膜上含B凝集原,血清中
最新回复
(
0
)