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
75
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.
【B1】
选项
答案
D
解析
此空之前的内容介绍了家庭冲突也是进化的主要推动力之一。此空处应具体地描述家庭冲突对进化的影响,故选D。
转载请注明原文地址:https://kaotiyun.com/show/96hd777K
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
Thepassageindicatesthatancienttreatmentsforinjuryanddiseasewere______.Itcanbeseenfromthepassagethattheeart
AAttractionsofTravellingBLanguageProblemWhenEatingOutCRevolutionCausedbyJetsDHowTravellers’ConcernsAreMe
MenTooMaySufferfromDomesticViolenceNearlythreein10menhaveexperiencedviolenceatthehandsofanintimatepartnerd
HowOneSimpleMovementCanLetSliptheSecretsoftheMindBodylanguageisthequiet,secretandmostpowerfullanguageofal
Inthepast,doctorscouldn’tdoanythingaboutstomachulcers.Stomachulcerscanleadtostomachcancer.
Accordingtothepassage,thepurposeofeffectivereadingwithhigherspeedismostlikelytohelpyou______.Accordingtoth
AttentiontotheDetails1Attentiontodetailissomethingeveryonecanandshoulddo—especiallyinatightjobmarket.BobCr
Practicallyallspeciesofanimalscommunicateeitherthroughsoundsorthroughalargerepertoryofsoundlesscodes.
IntheUS,aperson’scompanybuyshimorherhealthinsurance.ThehealthcaresystemintheUStakescareofeveryoneinthe
ImaginemydismaywhenIgothometofindthatmyapartmenthadbeenbrokeninto.
随机试题
存盘或写盘是将数据存放到()中,以便长期使用。
大众传播的社会功能中,被学者称为“整合功能”的是
急诊科的隔离要求是什么?
非胰岛素依赖型糖尿病与胰岛素依赖型糖尿病的最主要区别是
A.细胞毒性脑水肿B.血管源性脑水肿C.混合性脑水肿D.先有细胞毒性后转化为血管源性脑水肿E.脑水肿以脑灰质的肿胀甚于白质下列疾病多见于哪一种类型的脑水肿
游离皮瓣移植后应避免
测验的效度是指多次测验分数的稳定和一致的程度。()
在一个宏的操作序列中,如果既包含带条件的操作,又包含无条件的操作。则带条件的操作是否执行取决于条件试的真假,而没有指定条件的操作则会()。
Thefirstthingforyoutodobeforeyoubuyclothesistoreadthelablesinsidetheclothes.Ifyouwanttosavemoney,youc
A、Theycanbecreativewhentheyfeelsecure.B、Theymaypanicinfrontofhighplaygroundequipment.C、Theyshouldbeawareof
最新回复
(
0
)