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
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow
admin
2015-07-17
32
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 recendy 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 litde 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.
The word " affect" in Paragraph 6 could be best replaced by______.
选项
A、influence
B、effect
C、stop
D、present
答案
A
解析
affect这个动词的意思是“影响”,和influence是同义词,在这个上下文里可以替换用。
转载请注明原文地址:https://kaotiyun.com/show/Z6Gd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
IcyMicrobes1InicethathassealedasaltyAntarcticlakeformorethan2,800years,scientistshavefoundfrozenbacteriaa
ANewFindingBritishcancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfectionandclustersofcase
ANewFindingBritishcancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfectionandclustersofcase
ChangesinMuseumsMuseumshavechanged.Theyarenolongerplacesthatone“should”visit,theyareplacestoenjoyandl
ChangesinMuseumsMuseumshavechanged.Theyarenolongerplacesthatone“should”visit,theyareplacestoenjoyandl
TheEffectsofGlobalWarmingonWeatherTherearehiddenfactorswhichscientistscall“feedbackmechanisms”.Nooneknow
Singapore1.Singaporeisanindependentcity-stateinsoutheasternAsia,consistingofonemajorislandtheSingaporeIsland--an
ThepeopleofKiribatiworrythatonedaytheircountrywillbetakenawaybyasuddenhightide.Thecoralislandnationsoft
PuertoRicanCuisine(菜肴)PuertoRico,aCaribbean(加勒比海区)islandrichinhistoryandremarkablenaturalbeauty,hasacuisine
随机试题
阅读下列文字,然后回答问题。臣闻地广者粟多,国大者人众,兵强则士勇。是以泰山不让土壤,故能成其大;河海不择细流,故能就其深;王者不却众庶,故能明其德。是以地无四方,民无异国,四时充美,鬼神降福,此五帝三王之所以无敌也。今乃弃黔首以资敌国,却宾客以
慢性肺源性心脏病急性加重期大量使用呋塞米时可引起
阿司匹林的化学结构式为()。
我国正在推行的人民币货币市场基准利率指标体系是()。
影响课堂培训效果的因素包括()。
一个长方体形状的玻璃鱼缸,从鱼缸的内侧量,它的2个相邻的侧面及底面的面积分别为5、6、7.5平方分米,则这个玻璃鱼缸最多可以装()立方分米的水。
边际效用
在E-R图中,用来表示实体联系的图形是()。
"ZoologyClass"Accordingtotheprofessor,whatisbudding?
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumansare.Considerthefruit-flyexperimentsdescribedb
最新回复
(
0
)