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
53
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/6gQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
VoyagetoAntarcticaAntarcticaisnotaneasyplacetogetto,butincreasingnumbersofpeoplevisitAntarcticaeveryyear
1Tiredofsocialnetworking?LoggingoffFacebook?You’reprobablynottheonlyone.Fearingfortheirprivacyorperhapsjust
Lookingtohelptheenvironment?Considerthefollowingsimpleideas.Turnoffelectricaldeviceswhenthey’renotbeinguse
LifeintheUniverseManyscientiststodayareconvincedthatlifeexistselsewhereintheuniverse-lifeprobablymuchlike
A.putforwardtheideaoffoundingtheOpenUniversityB.thanitcouldadmitC.learnthroughcorrespondenceD.offerfoundati
A.putforwardtheideaoffoundingtheOpenUniversityB.thanitcouldadmitC.learnthroughcorrespondenceD.offerfoundati
AtheycanfindthebeststudentsBtheuniversity’sacademicadvancementandphysicalextensionCsomeofthemostdistinguishe
ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalcloc
Organicfood:Why?1.Europeisnowthebiggestmarketfororganicfoodintheworld,expandingby25percentayearoverth
ResearchbyDr.CameronseemstosuggestthatexercisecanTheexpression"beefup"inparagraph3means
随机试题
A.血皮质醇升高,ACTH降低,双侧肾上腺增生伴结节B.血皮质醇升高,ACTH升高,双侧肾上腺皮质弥漫增生C.血皮质醇升高,ACTH降低,血钾正常D.血皮质醇升高,ACTH降低,伴明显低钾碱中毒(2009年)肾上腺皮质腺癌的特点是
在进行建设项目财务评价时,利息备付率的基准判据是()。
国际税收问题谈判的出发点有()。
某食品生产企业(非科技型中小企业)于2015年1月注册成立进行生产经营,2016年应纳税所得额为—100万元。2017年度生产经营情况如下:(1)销售产品取得不含税收入20000万元。(2)产品销售成本10000万元。(3)销售税金及附加500万元。
___________是学习评价中最常用的一种类型。
决定教育的结构和人才培养规格的社会因素是()
设判断f(x)在(一∞,1]是否有界,并说明理由.
按下列要求用Excel建立数据表格和图表,具体要求如下:(1)请将下列某种放射性元素衰变的测试结果数据建成一个数据表(存放在A1:D6区域内),求出实测数值与预测数值之间的误差的绝对值,其数据表保存在sheet1工作表中。(2)对建立的数
StomachUlcerStomachulcersarethecauseofseverepainformanypeople.Doctorshavebeenabletohelplessenthepainof
HowtoFaceDeathItisoftenobservedthattheagedspendmuchtimethinkingandtalkingabouttheirpastlives,ratherthan
最新回复
(
0
)