首页
登录
职称英语
Traffic fumes render the scent of flowers barely recognizable to honeybees an
Traffic fumes render the scent of flowers barely recognizable to honeybees an
游客
2024-01-31
48
管理
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. [br] Why is the pollination activity crucial?
选项
A、Because it affects the amount of bees.
B、Because it affects growth of food crops.
C、Because it affects flower scent.
D、Because it affects flower-rich habitats.
答案
B
解析
根据题干可以将该题定位至第二段。第二段指出世界上四分之三的粮食作物要依赖蜜蜂和其他自然授粉生长。Newman说:“授粉服务对人类来说至关重要。”因此可以选出B选项。
转载请注明原文地址:http://tihaiku.com/zcyy/3408768.html
相关试题推荐
[originaltext]Roadtrafficcrasheskill1.25millionpeopleeachyearworld
Itisallverywelltoblametrafficjams,thecostofpetrolandthequick
Itisallverywelltoblametrafficjams,thecostofpetrolandthequick
Itisallverywelltoblametrafficjams,thecostofpetrolandthequick
WhenwetalkaboutAmericansbarelyintoadulthoodwhoaresaddledwithunbe
WhenwetalkaboutAmericansbarelyintoadulthoodwhoaresaddledwithunbe
WhyYouShouldn’tFreakOutAboutSwarmingHoneybees—andHowtoSaveBeesFr
WhyYouShouldn’tFreakOutAboutSwarmingHoneybees—andHowtoSaveBeesFr
WhyYouShouldn’tFreakOutAboutSwarmingHoneybees—andHowtoSaveBeesFr
WhyYouShouldn’tFreakOutAboutSwarmingHoneybees—andHowtoSaveBeesFr
随机试题
It’shighly______thathewillbepromotedtothepostofassistantmanager.A、l
[originaltext]TheMP3doesn’tworkwell.What’swrongwithit?[/originaltext]A、
[originaltext]Advertisingisthetoolthathasalwaysbeenusedtoconvince
Ashipwithaheavyloadoftimberisreportedtohavesunk______thecoastofCa
[originaltext]W:Areyoureadytocheckout?M:Yes,youpaythebill,andI’ll
印象主义音乐的主要技术手法之一是() A.十二音 B.微分音
使用约束带时应重点观察A.病人心理状态 B.病人神志是否清楚 C.体位是否舒
历法是推算年月日,使其与相关天象对应并协调时间的方法。现行历法主要有三种:阳历即
根据《城市抗震防灾规划管理规定》,当遭受罕见的地震时,城市抗震防灾规划编制应达到
下列单位中,属于建设工程监理行为主体的是()。A.工程建设单位 B.工程监理单
最新回复
(
0
)