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
52
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
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Youwillhearthecustomsinfivecountries.Forquestions9-13,choosefromthelistA~Fthepropercountries.Usethe
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
随机试题
Theunhealthyingredientsandlownutritioncontentofthefoodcanmakeyoulessactiveandlazy,newresearchshows.Nosurpri
一个口袋内装有3个小球,另一个口袋内装有5个小球,这些小球颜色各不相同。①如果从两个口袋内各取1个小球,有多少种不同的取法?②如果从两个口袋内任取1个小球,有多少种不同的取法?
A.士的宁B.黄芩苷C.人参皂苷D.厚朴酚E.七叶内酯属于生物碱的是
房地产抵押是抵押人用其合法的房地产以()的方式向抵押权人提供债务履行担保的行为。
承包人采购的材料设备与设计要求或者标准要求不符时,工程师可以拒绝验收,由()重新采购符合要求的产品。
对上市公司公开发行新股进行核查的内核小组通常由()名专业人士组成,这些人员要保持稳定性和独立性。
根据公司法律制度的规定,上市公司在1年内购买、出售重大资产或者担保金额超过公司资产总额30%的,应当由股东大会作出决议,并经()通过。
中国共产党的组织原则是民主集中制,这在实际中反映了()。
人无信不立,政府部门也同样需要诚信,请结合报考岗位谈谈诚信和政府公信力。
Largecompaniesneedawaytoreachthesavingsofthepublicatlarge.Thesameproblem,onasmaller【B1】______,facespractica
最新回复
(
0
)