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
48
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.
Female frogs may not be attracted by the new call because ______.
选项
A、it is strange and unusual
B、they are used to the old call
C、the male frogs don’t know how to attract them
D、lower frequency has special physical meaning
答案
D
解析
由倒数第二段“When females have a choice between two males calling,...So, the bigger frogs tend to call lower,”可知体型大的青蛙叫声更低,更能吸引异性。D项指出低频率叫声有着特殊的物理意义,即青蛙的体型差异。所以D项真确。
转载请注明原文地址:https://kaotiyun.com/show/3Dua777K
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
targetlanguage
EnergyCrisisTheU.S.CensusBureauhasestimatedthatthepopulationoftheUnitedStatescouldapproach300millionin2
AccumulatingandexercisingsoftpowerhasbecomeadeliberatecomponentofChineseforeignpolicy.Theparamountleadersofthe
diplomaticcorps
Technically,negotiationoccursbetweenpeoplewhoareinterdependent,______thattheactionsofonepattyaffectthoseofthe
Pocahomta,aseventeenthcenturyPowhatanIndian,wenttotheJamestowncolonyasherfather’semissary.
Sheworkedhardathertaskbeforeshefeltsurethattheresultswould______herlongeffort.
Theveryessenceofcivillibertyconsistsintherightofeveryindividualtoclaimtheprotectionoflaws,______hereceives
Inwhatseemedlikeaninnocuousjoke,CharlieNicholas______triedtostealachipfromaholiday-makeroutsideabarinSanA
ThePaleolithiceraistheperiodofhistorycommonlyknownastheStoneAge.Itbeginswiththeappearanceofstonetoolsaroun
随机试题
一个量化过程中,输入值U=4V,又知在此量化区内最大量化误差e(t)=0.5V/2,求此量化过程的输出值。
下列可出现呼气性呼吸困难的是
男,25岁,左胸刀刺伤1小时来院,呼吸困难、发绀,胸部广泛皮下气肿,脉细速,左胸叩诊鼓音,呼吸音消失,气管右偏,应立即
A.背衬层B.药物贮库C.控释膜D.粘附层E.保护层膜控释型经皮给药系统的组成:
根据《中华人民共和国药品管理法》医疗机构配制的制剂应当是
【背景资料】某啤酒生产线设备安装工程项目,施工项目部在各工程正式施工开始前,对各项准备工作及影响质量的各因素和有关方面进行了质量控制。施工项目经理部为了确保工程项目质量符合设计意图和国家规范、标准的要求,采用PDCA循环方法对该工程进行质量控制。以下
请代为判断A注册会计师违反中国注册会计师职业道德规范的是( )。如已设立企业对收到的实收资本及其相关的资产、负债尚未按规定进行会计处理,注册会计师在接受委托进行验资时,应当( )。
家住农村的小谢,父母省吃俭用供其上大学。小谢毕业后有了一份待遇不错的工作,父母年岁大了,因劳累身体也有劳损,小谢对老人悉心照顾,满足老人衣食住行等各方面的需要,看到老人腿脚不方便就买来按摩椅给老人使用。在这里,老年人享有的权益是()。
“三个代表"重要思想形成的社会历史条件()。
A.条件(1)充分,但条件(2)不充分B.条件(2)充分,但条件(1)不充分C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分D.条件(1)充分,条件(2)也充分E.条件(1)和(2)单独都不充分,两个条件联合起来也不充分
最新回复
(
0
)