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
2014-08-13
81
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 percent 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.
【B3】
选项
答案
A
解析
此空之前的内容介绍了单身母亲比有配偶的雌性会更加努力,所以此空处的内容应为介绍具有配偶的雌性的情况,故选A。
转载请注明原文地址:https://kaotiyun.com/show/MPmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingarticleandanswerquestions9-18onthenextpage.TheNewColourofBritishArmy1Itt
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Youwillhearthecustomsinfivecountries.Forquestions9-13,choosefromthelistA~Fthepropercountries.Usethe
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Youaregoingtoreadanewspaperarticleaboutamanwhoisrunningroundtheworld.Eightparagraphshavebeenremovedfromth
随机试题
企业发生的各项费用支出,不属于期间费用项目的是()。
A.气体的扩散速率B.气体的扩散系数C.肺的扩散容量D.通气/血流比值单位时间内气体扩散的容积为
下列哪项是临床上最常用的关节镜度数
某规模化种猪场母猪出现体温升高,食欲不振,弱仔.死胎率达60%;哺乳仔猪体温升高至40℃以上,呼吸困难,耳朵发紫,眼结膜炎,3周内死亡率达70%。该病最可能是
行业自律与行政监督对于维护和规范招标投标秩序的不同作用主要体现在()。
根据《建设工程勘察设计管理条例》,建设工程勘察设计单位的义务是()Ⅰ.在建设工程施工前,向施工单位和监理单位说明建设工程勘察设计意图Ⅱ.在建设工程施工前,向施工单位和监理单位解释建设工程勘察设计文件Ⅲ.及时解决施工中出现的勘察设计
二灰中的粉煤灰用量越多,早期强度(),3个月的龄期的强度增长幅度也越大。
赵某是信达期货公司从业人员,在从业过程中,赵某为了发展业务,对其客户谎称另一期货从业人员职业操守有问题,不要把自己的期货交易委托给他管理。根据以上信息,回答下列问题:针对赵某的行为,期货业协会给予其暂停从业资格7个月的处分,期货业协会做出该处分后,应当
下列有关需求的表述,不正确的是()。
对儿童左右概念的发展研究表明()。
最新回复
(
0
)