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
36
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"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Youwillhearthecustomsinfivecountries.Forquestions9-13,choosefromthelistA~Fthepropercountries.Usethe
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Youaregoingtoreadanewspaperarticleaboutamanwhoisrunningroundtheworld.Eightparagraphshavebeenremovedfromth
Youaregoingtoreadanewspaperarticleaboutamanwhoisrunningroundtheworld.Eightparagraphshavebeenremovedfromth
随机试题
患者男性,62岁,10天来发热、咳嗽、胸痛,温39.5℃,血压100/70mmHg,突然出现皮肤多处斑,肢冷,呼吸困难,发绀。血压100/70mmHg,血2.5mmol/L,BUN8.2mmol/L。此患者最需要做的检查是
多肽链中主链骨架的组成是
体积较大的方块通常掺块石以()。
纳税人遗失税务登记证件时,应当在()天内书面报告主管税务机关,并登报声明作废。
发票收缴是指用票单位和个人按照规定向税务机关上缴已使用的发票或者未使用的发票。
国务院期货监督管理机构应当在受理期货公司设立申请之日起3个月内作出批准或不批准的决定。()
位于县城的某酒厂(一般纳税人)3月份委托位于市区的一家酒精加工厂(一般纳税人)为其加工一批新型酒精,酒厂提供的原材料价值为20000元(不含增值税),受托方收取加工费8000元(不含增值税)。当月酒厂将该批酒精全部收回。则下列说法正确的有()。(已知酒
对于()的绩效指标,设定的考评标准通常是一个范围。
甲、乙、丙三人分别被中山大学、暨南大学和华南师范大学录取。对于他们分别是被哪个学校录取的,同学们做了如下的猜测:①甲被暨南大学录取,丙被华南师范大学录取;②甲被华南师范大学录取,乙被暨南大学录取;③甲被中山大学录取,丙被暨南大学录取。结果,同学们的猜
Wehavenofiguresonthenumberofworkersemployedinthe______stagesofironproduction.
最新回复
(
0
)