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
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow in
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow in
admin
2009-06-15
39
问题
"Salty" Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo, from’ Sussex University’s School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.
The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 10m hectares (公顷) of agricultural land are lost because salt gets into the soil and stunts (妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves (红树林) that create swamps (沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透) in. In Latin America, irrigation often causes problems when water is evaporated (蒸发) by the heat, leaving salt deposits behind.
Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants’ growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.
选项
A、They are students at Sussex University.
B、They are rice breeders.
C、They are husband and wife.
D、They are colleagues at an institution of higher learning.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/rXUd777K
本试题收录于:
职称英语综合类A级题库职称英语分类
0
职称英语综合类A级
职称英语
相关试题推荐
Whatdoesthepassagemainlydiscuss?AllofthefollowingareprocessesthatdecreasesalinityEXCEPT______.
Male-FemaleExpectationaboutMarriageThedifferencesbetweenmenandwomenclarifywhytheyhavedifferentexpectationsab
ExercisebeinggoodorbadCanexercisebeabadthing?Suddendeathduringorsoonafterstrenuousexertiononthesquashc
ImportanceofthePublicImagePublicimagereferstohowacompanyisviewedbyitscustomers,suppliers,andstockholders,
ImportanceofthePublicImagePublicimagereferstohowacompanyisviewedbyitscustomers,suppliers,andstockholders,
MillionAmericansSufferfromSocialAnxietyDisorderSocialanxietydisorderpreventssome15millionAmericansfromleadin
A.usingphotosB.descriptionoftheHTMLpageC.currentpopularsearchenginesD.documentsearchE.informationi
SpellingandWritingThereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolI
MotherNatureShowsHerStrengthTornadoes(龙卷风)andheavythunderstormsmovedacrosstheGreatLakesandintoTrumbullCount
Youhavetobepatientifyouwanttosustainyourposition.
随机试题
金融期货合约的种类。
颜色通常用红、绿和蓝三原色的含量来表示。对于不具有彩色功能的显示系统,颜色显示为 ()()。
那场大雾直到11点钟才散去,延误了好几十个航班。
关于恶性黑色素瘤脑转移的治疗描述错误的是
男性患者,45岁,工人。一年前逐渐出现心前区疼痛、无力、气短症状,有时出现心前区疼痛并放射到左上肢和左后背。三月来有过两次晕厥。BP130/70mmHg,P90次/分,双肺未闻及干湿啰音,HR110次/分,律不齐,强弱不一,胸骨左缘3、4肋间闻及粗糙
[2012年第038题,2008年第037题]在住宅室内设计时,为了增加居室的宽敞感,下述处理手法哪一项是没有效果的?
竞争者业务信息的来源主要包括( )。Ⅰ.保监会每年的报告,总结每家保险公司的会计结算和统计结算的情况Ⅱ.保险公司对外公布的财务报表Ⅲ.保险公司向保监会递交的报告书,提供了更多的细节信息Ⅳ.与其他公司的会计人员或职员的直接联系
我国当前全面发展教育的组成部分是德育、智育、体育、()
在流水线结构的计算机中,频繁执行(3)指令时会严重影响机器的效率。当有中断请求发生时,采用不精确断点法,则将(4)。
There’sthisgreatrecurring"SaturdayNightLive"skitfromseveralyearsbackwherePhilHartmanplaysanunfrozencavemanwho
最新回复
(
0
)