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
Single-parent Kids Do Best Single mums are better at raising their kids than two parents—at least in the bird world. Mother
Single-parent Kids Do Best Single mums are better at raising their kids than two parents—at least in the bird world. Mother
admin
2014-09-12
53
问题
Single-parent Kids Do Best
Single mums are better at raising their kids than two parents—at least in the bird world. Mother zebra finches have to work harder and raise fewer chicks on their own, but they also produce more attractive sons who are more likely to get a mate.
The finding shows that family conflict is as important an evolutionary driving force as ecological factors such as hunting and food supply.【B1】______
In evolutionary terms, the best strategy for any parent in the animal world is to find someone else to care for their offspring, so they can concentrate on breeding again. So it’ s normal for parents to try to pass the buck to each other. But Ian Hartley from the University of Lancaster and his team wondered how families solve this conflict, and how the conflict itself affects the offspring.
【B2】______They compared single females with pairs,by monitoring the amount of food each parent collected, and removing or adding chicks so that each pair of birds was raising four chicks, and each single mum had two—supposedly the same amount of work.
But single mums, they found, put in about 25 per cent more effort than females rearing with their mate. 【B3】______"The offspring suffer some of the cost of this conflict," says Hartley.
The cost does not show in any obvious decrease in size or weight, but in how attractive they are to the opposite sex. When the chicks were mature, the researchers tested the "fitness" of the male offspring by offering females their choice of partner.【B4】______
Sexual conflict has long been thought to affect the quality of care given to offspring, says zoologist Rebecca Kilner at Cambridge University, who works on conflict of parents in birds. "But the experimental evidence is not great. The breakthrough here is showing it empirically. "
More surprising, says Kilner, is Hartley ’ s statement that conflict may be a strong influence on the evolution of behaviour, clutch size and even appearance. "People have not really made that link," says Hartley. A female’ s reproductive strategy is usually thought to be affected by hunting and food supply. 【B5】______
A. To avoid being exploited, mothers with a partner hold back from working too hard if the father is being lazy, and it’ s the chicks that pay the price.
B. To find out, they measured how much effort zebra finch parents put into raising their babies.
C. Those males reared by single mums were chosen more often than those from two-parent families.
D. With two parents around, there’ s always a conflict of interests, which can have a detrimental effect on the quality of the offspring.
E. Kilner says conflict of parents should now be taken into account as well.
F. It turned out that single mums had greater influence on their offspring.
【B4】
选项
答案
C
解析
前一句的内容主要描述了当雄性雏鸟成熟时,研究人员对其进行配偶选择方面的实验。此空的内容应接着叙述实验的结果,故选C。
转载请注明原文地址:https://kaotiyun.com/show/B6hd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
MARY’SDIARYMonday:10.00a.m.Dentistappointment2,30-3.30p.m.51.______withSamTuesday:
AActionsTakentoHelpBTreatmentofVomitingCTheDifferencebetweenLifeandDeathDMedicalImportanceofFirstAidE
StressCanMakeYouSickScientistsarenowstudyinganewfieldofresearchwhichiscalledpsychoimmunology(心理免疫学).Itisb
StressCanMakeYouSickScientistsarenowstudyinganewfieldofresearchwhichiscalledpsychoimmunology(心理免疫学).Itisb
AHistoryofAspirinBBadThingsaboutAspirinCOriginofAspirinDGoodThingsAboutAspirinEHowAspirinWorksinthe
After-birthDepressionBlamedforWoman’sSuicideAnewmotherapparentlysufferingfrompostpartummentalillnessfelltoherd
Thatapartmenthasbeenvacantforoveramonth.
TheDayaLanguageDiedWhenCariosWestezdiedattheageof76,alanguagedied,too.Westez,morecommonlyknownasRedT
Manyresidentsofapartmentcomplexesobjecttonoisyneighbors.
Comparedwithlargeaircraft,smallairplanesarenotasstreamlinedandhencearelessefficient.
随机试题
媒介融合的技术基础是
Whentwohandsmeet,wepassonsomethingofourselves.After【C1】______toMarkTwain,Helen—whowasbothdeafandblind—commente
A.2000cGyB.3000cGyC.4000cGyD.5000cGy以上E.6000cGy以上脊髓在受量多少可出现放射性的脊髓炎,发生率在5%
贴现法是指银行向企业发放贷款时,先(),而到期时借款企业偿还全部本金的一种计息方法。
在我国,询价分为初步询价和累计投标询价两个阶段。发行人及其保荐机构通过初步询价确定发行价格区间,通过累计投标询价确定发行价格。()
纳税人应当在向公安机关等车辆管理机构(),缴纳车辆购置税。
建立社会主义市场经济体制,就必须使国有企业真正成为()。
下列内部排序算法中,其比较次数(或交换次数)与序列初态无关的算法是()。
Greghadapremonitionthatthedaywouldnotgowell,andjustashefeared,hehadtwoimportantquizzesahead.
A、Themanwillbuythewomanacoat.B、Themanwillgivethewomanhiscoat.C、Thewomanisnotcarefulenough.D、Themanwillb
最新回复
(
0
)