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
Traffic fumes render the scent of flowers barely recognizable to honeybees and could have a serious impact on their ability to f
Traffic fumes render the scent of flowers barely recognizable to honeybees and could have a serious impact on their ability to f
admin
2017-11-08
36
问题
Traffic fumes render the scent of flowers barely recognizable to honeybees and could have a serious impact on their ability to find food, new research has found. Scientists discovered that reactive pollutants in diesel (柴油) destroyed key chemicals in the odour of oilseed flowers making them smell different to the bees.
"Honeybees have a sensitive sense of smell and an exceptional ability to learn and memorize new odours," said Tracey Newman, a neuroscientist at the University of Southampton. "The effect of diesel fumes on flower scent could have serious detrimental effects on the number of honeybee colonies and pollination (授粉) activity." Three-quarters of the world’s food crops rely on bees and other natural pollinators " Pollinator services are crucial to humankind," said Newman.
But there have been serious declines in natural pollinators in recent decades. A combination of factors is blamed, including the huge loss of the flower-rich habitats that sustain bees, as well as disease, and the impact of agricultural insecticides. The revelation that traffic fumes could be adding to the problems is significant, said Guy Poppy, a professor and ecologist at Southampton, who also worked on the research. He said, "Diesel exhaust is not the root of the problem, but clearly, with all the other stressors, adding another one is likely to be detrimental to bee health."
The study, published in the journal Scientific Reports, tested bees’ ability in the laboratory to recognize the aroma of oilseed rape flowers. Bees were strapped down and taught to associate floral scents with food in the form of sugar solutions. Once the bees learned the connection they began sticking their tongues out in anticipation of food even if it was not offered—an indication that they recognized the smell. When the scent was presented without pollutants the bees recognized it 98% —99% of the time. But after the scent was mixed with levels of diesel exhaust matching those found at roadsides, the bees only recognized it 30% of the time.
By saying "Diesel exhaust is not the root of the problem, but clearly, with all the other stressors, adding another one is likely to be detrimental to bee health," Guy Poppy probably means________.
选项
A、Although diesel exhaust is not the main problem, it still affects bee’s health.
B、The effect of diesel exhaust is not very important to bee.
C、Diesel exhaust will not influence bee’s health.
D、There are still other stressors that will affect bee’s health.
答案
A
解析
该句的句意为:柴油车尾气并不是问题的根源,但很明显,和其他问题所带来的压力一起加入的另一个影响因素可能会对蜜蜂健康带来不利的影响。因此A的表述更符合,“尽管柴油车尾气不是主要的问题,但仍然影响了蜜蜂的健康”。
转载请注明原文地址:https://jikaoti.com/ti/68UFFFFM
0
大学英语四级
相关试题推荐
Designingforsustainability:whatarethechallengesbehindgreenmaterials?A)LearningtosurfinCalifornia’sicybreakers,T
Designingforsustainability:whatarethechallengesbehindgreenmaterials?A)LearningtosurfinCalifornia’sicybreakers,T
Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwouldneverbelieve.Foreverytaleofshreddedcushion,
Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwouldneverbelieve.Foreverytaleofshreddedcushion,
Writeanessaycommentingontheremark"Lifeisfullofrosesandthorns."Youmaystateyourownviewondisasters.Youshould
Acidrain,whichisaformofairpollution,currentlybecomesasubjectofgreatdebatebecauseofwidespreadenvironmentaldam
Acidrain,whichisaformofairpollution,currentlybecomesasubjectofgreatdebatebecauseofwidespreadenvironmentaldam
TheEskimoshavedevelopedacapacitytolivepeacefullywithoneanother.Theyhavenothadastrictsystemoflandownership,o
TheEskimoshavedevelopedacapacitytolivepeacefullywithoneanother.Theyhavenothadastrictsystemoflandownership,o
TheEskimoshavedevelopedacapacitytolivepeacefullywithoneanother.Theyhavenothadastrictsystemoflandownership,o
随机试题
正常注水井在相同压力下,日注水量比测试水量下降超过()时,对下可洗井封隔器的井,应及时进行洗井。
用来代表全身脂肪和肌肉情况的是
本病例当诊断为本病例的选方为
男性,50岁。慢性咳嗽5年,糖尿病史2年。咳喘加重一月,发热一周来诊。检查结果:血pH7.25,PaO240mmHg,PaCO285mmHg,BE—10mmol/L。考虑的诊断是
APOXBPASCAS-DNAEDACPENAP诊断慢粒最常用的化学染色是
患者,男,53岁。风湿性心脏病20年。现心悸气急,咳嗽喘促,不能平卧,咯白痰,胸脘痞闷,头晕目眩,尿少浮肿,或伴痰鸣,舌苔白腻,脉弦滑。治疗方剂是
药品注册证书有效期为
测定沥青软化点应进行2次平行试验,并要求两次测定值的差值应符合重复性试验精密度要求。()
“无正文说明”的作用是()。
BeMoreWeil-Spoken1.Preparealot■【T1】______yourideasbeforeyousaythem【T1】______■【T2】______whatyou’ll
最新回复
(
0
)