首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
To many environmentalists, the extinction of plants—accompanied by the increasing genetic uniformity of species of food crops—is
To many environmentalists, the extinction of plants—accompanied by the increasing genetic uniformity of species of food crops—is
admin
2014-10-21
66
问题
To many environmentalists, the extinction of plants—accompanied by the increasing genetic uniformity of species of food crops—is the single most serious environmental problem. Something must be done to prevent the loss of wild food plants or no-longer-cultivated food plants. Otherwise, the lack of genetic diversity could allow a significant portion of a major crop to be destroyed overnight. In 1970, for example, southern leaf blight destroyed approximately 20 percent of the United States corn crop, leaving very few varieties of corn unaffected in the areas over which the disease had spread. Which of the following can be inferred from the passage above?
选项
A、Susceptibility to certain plant diseases is genetically determined.
B、Eighty percent of the corn grown in the United States is resistant to southern leaf blight.
C、The extinction of wild food plants can in almost every case be traced to destructive plant diseases.
D、Plant breeders focus on developing plants that are resistant to plant disease.
E、Corn is the only food crop threatened by southern leaf blight.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/mOtO777K
本试题收录于:
GMAT VERBAL题库GMAT分类
0
GMAT VERBAL
GMAT
相关试题推荐
Likemostpeople,Iwasbroughtuptolookuponlifeasaprocessofgetting.ItwasnotuntilinmylatethirtiesthatImadet
Theautomobilehasmanyadvantages.Aboveall,itofferspeoplefreedomtogowhereverandwhenevertheywanttogo.However,to
ThanksgivingDayisalwayscelebratedonthefourthThursdayofNovember.ItisthemosttraditionalofAmericanholidays.Thef
Aseasonticket________theholdertomakeasmanyjourneysashewishedwithinthestatedperiodoftime.
Atpresenttime,peoplehaveatrendtoliveinthe
Myfatherwasaskedto______theNewYorkoffice.
Concerningmoneyoranythingelse,conflictsbetweenhusbandandwifeusuallyreflectapowerstruggle.Conflictsbetweenparent
Therewasonethoughtthatairpollutionaffectedonlytheareaimmediatelyaroundlargecitieswithfactoriesandheavyautomob
Weallknowthatitispossibleforordinarypeopletomaketheirhomesontheequator(道),althoughoftentheymayfeeluncomfo
Tourismhasbecomeaverybig【C1】______.ForSpain,ItalyandGreeceitisthelargest【C2】______offoreignexchange,andevenfo
随机试题
下列哪种疾病可出现中枢性呕吐
房地产开发企业申领《建设工程施工许可证》应具备的条件包括()。
新设项目法人的资本金是项目发起人和投资者为拟建项目所投入的资金,下面内容属于项目资本金来源的有()。
下列关于建设工程返修的表述,错误的是()。
复式记账法是以资产权益平衡关系作为记账基础,对于每一笔经济业务,都要在两个或两个以上相互联系的账户中进行登记,系统地反映资金运动变化结果的一种记账方法。()
经国务院证券监督管理机构批准,证券公司可依法经营()部分或者全部业务。
某汽车厂为增值税一般纳税人,其2003年9月份主要业务情况如下:(1)销售给汽贸公司A型小客车500辆,5.8万元/辆(不含税),因汽贸公司购货量大,该汽车厂决定给予5%的折扣,并在开具的增值税专用发票上分别注明销售额和折扣额。(2)销售给某使用单位B型小
n维列向量组α1,α2,…,αm(m<n)线性无关,则n维列向量组β1,β2,…,βm线性无关的充分必要条件是().
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
请以公司人力资源部的名义写一封周末休息通知。内容包括:1.本周日全员休息;2.周六下午请关好门窗,关闭自己的电脑电源;3.周一按时上班;4.希望大家配合,并表示感谢。
最新回复
(
0
)