首页
登录
职称英语
One of Nature’s most exciting mysteries is how pigeons find their way home o
One of Nature’s most exciting mysteries is how pigeons find their way home o
游客
2023-10-10
36
管理
问题
One of Nature’s most exciting mysteries is how pigeons find their way home over vast distances. Now German scientists believe they have discovered how the birds do it. Research has revealed that tiny iron structures in their beaky(鸟嘴)allow them to analyze the earth’s magnetic field—much like a compass(罗盘). Through the signals picked up, the birds can work out where they are and set out on the best course home.
As well as pigeons, many other birds display a remarkable ability to fly thousands of miles to return to a specific garden or tree year after year. Scientists are suggesting they may have similar iron-containing cells in their beaks.
In the past, experts have suggested the birds use the sun and stars to navigate, although in 2004 researchers found that many follow roads rather than their internal compass to plan their route. However, scientists have long believed that they can in some way use the natural magnetism of the earth to navigate. The recent study by German scientists has revealed how this may be possible.
The research used X-rays to examine the upper beaks of pigeons. They found that within the skin lining are tiny iron-containirg particles(微粒)in nerve branches which are arranged in a 3D pattern. The team, led by Gerta Fleissner, concluded that this allows the birds to react to the external magnetic field of the planet and work out their precise location.
She pointed out that similar iron-containing cells had been found in the beaks of robins, warblers and chickens so it may well turn out to be the way that other species also navigate.
Scientists are still discovering more about the incredible abilities of the pigeon.
Questions: [br] In 2004 some researchers found that many birds do not______to plan their route.
选项
答案
use their internal compass
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3087542.html
相关试题推荐
CharlesDickenswasafamousnineteenth-centurywriterandthesignature"C
CharlesDickenswasafamousnineteenth-centurywriterandthesignature"C
CharlesDickenswasafamousnineteenth-centurywriterandthesignature"C
CharlesDickenswasafamousnineteenth-centurywriterandthesignature"C
CharlesDickenswasafamousnineteenth-centurywriterandthesignature"C
Scientistsbelievetheyhavesolvedoneoftheenduringmysteriesofthesex
Scientistsbelievetheyhavesolvedoneoftheenduringmysteriesofthesex
Scientistsbelievetheyhavesolvedoneoftheenduringmysteriesofthesex
Scientistsbelievetheyhavesolvedoneoftheenduringmysteriesofthesex
Scientistsbelievetheyhavesolvedoneoftheenduringmysteriesofthesex
随机试题
Hisheavydrinkingandfondofgamblingmakeshimapoorrolemodel.A、andfactt
[originaltext]W:Goodeveningandwelcometotonight’sprogram,Ourguestisth
某公司的质量目标是每千行代码缺陷数不大于2.5个,项目组为确保目标的达成,并对软
患者,女性,50岁。反酸嗳气2年,恶心、呕吐2个月。呕吐物为宿食,不含胆汁,体重
合同履行期间,因人工、材料、工程设备和机械台班价格波动影响合同价格时,人工、机械
根据Q/GDW10231-2016无人值守变电站技术导则,关于断路器和隔离开关
董事长应当自接到提议后()日内,召集和主持董事会会议。A:7 B:10 C:
《预算法》第六十四条规定,各级预算预备费的动用,由()提出。A.本级政府 B
(2017年真题)某药品零售企业陈列商品的做法,错误的是( )A.毒性中药品种
导致钻孔灌注桩施工中断桩的原因有()。A.集料级配差,混凝土和易性差而造成离析卡
最新回复
(
0
)