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
2009-06-15
28
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 saltwater. 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 1Om 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/BFLd777K
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
FDAhasapprovedtheplanofusingHIVtocurecancerinhumans.TheHIVvirushascausedmoredeathsindevelopedcountries.
StemCellTherapyMayHelpRepairtheHeartAccordingtoscientistsintheUSA,stemcelltherapymayonedaybeabletorepa
MuseumsintheModernWorld1.Museumshavechanged.Theyarenolongerplacesfortheprivilegedfeworforboredvacationerst
MuseumsintheModernWorld1.Museumshavechanged.Theyarenolongerplacesfortheprivilegedfeworforboredvacationerst
BacteriaBacteriaareextremelysmalllivingthings.Whilewemeasureourownsizesininchesorcentimeters,bacterialsize
Pleasebecarefulwhenyouaredrinkingcoffeeincaseyousmudgethenewcarpet.
Unlikegases,liquidsaredifficulttocompressbecausethereispracticallynofreespacebetweenmolecules.
Agoodorganizerpaysattentiontodetail.
SnowflakesYou’veprobablyheardthatnotwosnowflakesarealike.Ofcourse,nobodyhaseverconfirmedthatstatementbyexamin
Thepresidentofthesoccerassociationsaidthatthetwobestteamsmightmergeinthenextmonth.
随机试题
吸宫时能预防术后感染的是
围绝经期,尿中促性腺激素的排出量是下列哪种情况
A.造血干细胞增生和分化异常B.遗传性血红蛋白合成异常C.慢性失血D.获得性红细胞膜缺陷E.遗传性红细胞膜缺陷再生障碍性贫血
双侧唇裂修复的时间为
制备嵌体窝洞时,与修复体边缘封闭直接有关的是
下颌骨骨折后颌间固定的时间为
百合固金汤中的玄参是
征地补偿和安置补助的原则是保证被征地农民的生活水平不因征地而降低。()
依据《安全生产许可证条例》的规定,地方煤矿企业安全生产许可证的颁发机关是()。
根据侵权责任理论,下列有关过错责任原则的表述正确的是()。
最新回复
(
0
)