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
考研
Women’s fertility is determined in large part at birth. They are born with their total number of reproductive cells, which norma
Women’s fertility is determined in large part at birth. They are born with their total number of reproductive cells, which norma
admin
2022-09-06
69
问题
Women’s fertility is determined in large part at birth. They are born with their total number of reproductive cells, which normally influences the age at which menopause—the shutting down of female reproductive system—begins. But in the 1990s, researchers proposed that if a child’s energy is depleted by malnutrition, disease, or other factors, he or she would be less fertile as an adult By using the natural experiment of migration, researchers demonstrated how differences during childhood do alter the course of reproduction in adult women.
Biological anthropologist Gillian Bentley of Durham University in the UK and colleagues compared levels of reproductive hormones in 250 Bangladeshi women, including women who migrated from Sylhet, Bangladesh to London; women who stayed in Sylhet; and Bangladeshi women born in London. In the first stage of their study, they found that women who migrated from Bangladesh as children had higher levels of reproductive hormones in their saliva than women who lived in Sylhet, but less than women born in London. This had a direct effect on fertility: Migrant women in London had an 11% higher rate of ovulation—discharging of mature ovum—during their lives than did women in Sylhet, the team reported in 2007.
The team has now studied 900 women between the ages of 35 and 60 to see if the beginning of menopause varies between migrants and women in Sylhet. Bentley presented preliminary results from their measurement of hormones that regulate the maturation of reproductive cells and are indirect indices of how many ova they can still produce. Her team found that migrants enter menopause later than did women who stayed in Bangladesh but earlier than did those born in London. "The adult migrants seem to be sensitive to improved conditions," says Bentley.
The group is trying to find out which environmental factors in Bangladesh lower growing girls’ fertility. All the Bangladeshi women in the study came from middle-class, land-owning families, who grew up with adequate calories. However, girls growing up in Bangladesh were probably exposed to more infectious diseases during crucial developmental years. So, they may have had to make tradeoffs among using energy to grow, to maintain their bodies, or to maximize their reproductive potential as adults. Bentley plans to test that idea next year when her team returns to Bangladesh to see if girls there suffer from more diseases than do those in London. "In other words," says Bentley, "where you spend your childhood influences adult reproductive function."
Which of the following is the best title for this text?
选项
A、More Energy, More Fertility
B、Childhood and Adulthood
C、Reproductive Fate vs. Environment
D、Migration Might Be a Choice
答案
C
解析
通读全文以及文章最后一句话可得出文章的主要内容是研究妇女生长环境与其生育能力之间的关系,因此C项正确。A项讲的是精力和生育能力之间的关系,B项是童年和成年的关系,都与文章研究的主题无关;D项“移民可能是一个选择”表述太笼统,未涉及文章主题。
转载请注明原文地址:https://kaotiyun.com/show/CTmZ777K
0
考研英语一
相关试题推荐
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalsoholdmoreadvanceddegreesthantheirmale【C1】______
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalsoholdmoreadvanceddegreesthantheirmale【C1】______
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalsoholdmoreadvanceddegreesthantheirmale【C1】______
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalsoholdmoreadvanceddegreesthantheirmale【C1】______
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
HarvardprofessorHarveyMansfieldstirredupcontroversyrecentlybycriticizingtheviolentgradeinflationathisinstitution
HarvardprofessorHarveyMansfieldstirredupcontroversyrecentlybycriticizingtheviolentgradeinflationathisinstitution
Prewritingreferstostrategiesyoucanusetogenerateideasbeforestartingthefirstdraftofapaper.Prewritingtechniques
Therigidhigher-educationbusinessisabouttoexperienceawelcomeearthquake.Traditionaluniversitiesnowfaceanew【C1】____
Americawillneveragainhaveasanationthespiritofadventureasit______beforetheWestwassettled.
随机试题
在ISO9000系列标准中,指导企业建立质量体系进行质量管理的标准是
呼吸急促,喉中哮鸣,胸膈满闷如窒,咳不甚,痰少咯吐不爽,面色晦滞带青,口不渴,形寒怕冷舌苔白滑,脉浮紧。其治疗主方为
3位侧链上含有1-甲基四唑基的是( )。3-位有乙酰氧甲基,7-位侧链上含有2-氨基-4-噻唑基的是( )。
A.心与脾的关系B.脾与肾的关系C.肺与肾的关系D.肺与脾的关系E.肺与肝的关系
患者,女性,68岁。因乳腺癌住院化疗,为其输液过程中,患者出现呼吸困难,听诊心前区有响亮的“水泡音”,患者可能发生空气栓塞,空气栓塞的部位是在
下列关于日本宪法的说法,正确的是?()
债券的收益率曲线为“正向”,表明当债券期限增加时,收益率( )。
元代书风“外观温文尔雅,而内寓刚劲”,与鲜于枢、邓文原并称为“三大家”的书法家是()。
小梅小学毕业后,其母以家中生活困难为由,让她辍学打工,小梅本人也欣然接受。小梅母女的行为违反了义务教育法。()
将考生文件夹下的BRUST文件夹移动到考生文件夹下TURN文件夹中,并改名为FENG。
最新回复
(
0
)