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
考研
Australia’s frogs are having trouble finding love. Traffic noise and other sounds of city life, such as air conditioners and con
Australia’s frogs are having trouble finding love. Traffic noise and other sounds of city life, such as air conditioners and con
admin
2011-12-20
88
问题
Australia’s frogs are having trouble finding love. Traffic noise and other sounds of city life, such as air conditioners and construction noise, are drowning out the mating calls of male frogs in urban areas, leading to a sharp drop in frog populations. But, in the first study of its kind, Parris, a scientist at the University of Melbourne has found that some frogs have figured out a way to compensate for human interference in their love lives.
A male southern brown tree frog sends out a mating call when he’s looking for a date. It is music to the ears of a female southern brown tree frog. But, add the sounds of nearby traffic and the message just is not going out. Parris spent seven years studying frogs around Melbourne. She says some frogs have come up with an interesting strategy for making themselves heard.
"We found that it’s changing the pitch of its call, so going higher up, up the frequency spectrum, being higher and squeakier, further away from the traffic noise and this increases the distance over which it can be for heard," Parris said.
The old call is lower in pitch. The new one is higher in pitch.
Now, that may sound like a pretty simple solution. But, changing their calls to cope with a noisy environment is actually quite extraordinary for frogs. And while the males have figured out how to make themselves heard above the noise, Parris says it may not be what the females are looking for.
"When females have a choice between two males calling, they tend to select the one that calls at a lower frequency because, in frogs, the frequency of a call is related to body size. So, the bigger frogs tend to call lower," she explained. "And so they also tend to be the older frogs, the guys perhaps with more experience, they know what they’re doing and the women are attracted to those. "
Frog populations in Melbourne have dropped considerably since Parris began her research, but it is not just because of noise. Much of Australia has been locked in a 10-year drought, leaving frogs fewer and fewer ponds to go looking for that special someone.
Why do some frogs change the pitch of its calls?
选项
A、To be different from others.
B、To attract a female frog.
C、To tend out messages.
D、To go against traffic noises.
答案
D
解析
..further away from the traffic noise and this increases the distance over which it can be for heard,”得知青蛙改变音高是为了避免噪音干扰。
转载请注明原文地址:https://kaotiyun.com/show/tDua777K
本试题收录于:
翻译硕士(翻译硕士英语)题库专业硕士分类
0
翻译硕士(翻译硕士英语)
专业硕士
相关试题推荐
sovereignstates
ConvertingtheMasses:StarbucksinChinaItsoundslikeMissionImpossible:sellcoffeetoChina’steadrinkers.Starbucks’so
CharteroftheUnitedNations
RustbeltStates
Astatictechnocraticorder,bycontrast,requiresaverydifferentsortofpersonality:adronewhodoeswhatheistoldandsh
NobodysawtheCEOattheseminar;he______atit
CanyoubelievethatIwonthephotocontestwiththe______ofthetwopicturesthatwasmostesthetic,eventhoughIonlytried
Nobodyknowsforsurehowmuchthesefreeofficialbanquetshavecostthepeople,butitmusthavereachedon______figure.(astro
The______purposeofscientificdiscourseisnotthemerepresentationofinformationandthought,butratheritsactualcommunic
Moderninfomercialsusuallyreliedoncelebrityendorsementratherthanhigh-pressuresalesmentolentcredibilitytotheirprod
随机试题
城镇化是现代化的必由之路,要推进以()为核心的新型城镇化。
有限责任公司的设立条件是什么?
《谈时间》一文选自梁实秋的散文集()
育龄女性,停经50天,阴道大量出血,急诊来院。查:脉搏110次/分,血压90/40mmHg,内诊查宫口处有胚胎组织堵塞,宫体略大。下列正确处理方法为
战汗表现为盗汗表现为
伤寒患者最适宜的饮食是
【背景资料】某安装公司承接一高层商务楼的机电工程改建项目。该高层建筑处于闹市中心,有地30层,地下3层。工程改建的主要项目有:变压器、成套配电柜的安装调试;母线安装、主干电缆敷设;给水主管、热水管道的安装;空调机组和风管的安装;冷水机组、水泵、冷
社会主义初级阶段是发展中国家进人社会主义社会所要经历的特定阶段。()
将PC机组成以太局域网必须用到网卡、中继器和集线器等设备,其中的一种设备可用来对接收到的信号进行再生放大,扩大网络的传输距离,并通过它来连接网络中的各个结点机,把一个端口接收到的信息向所有的端口分发出去,这种网络设备是______。
下列关于数据库设计的叙述中,正确的是
最新回复
(
0
)