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
Scientists have long speculated as to the extent that inbreeding contributes to the decline and eventual extinction of la
Scientists have long speculated as to the extent that inbreeding contributes to the decline and eventual extinction of la
admin
2011-01-17
53
问题
Scientists have long speculated as to the extent that inbreeding contributes
to the decline and eventual extinction of large assimilated populations, most
agreeing that in natural populations the impact of inbreeding depression on
Line population survival is insignificant in comparison to that of demographic and
(5) environmental variables. While there is ample evidence of fitness reduction due
to inbreeding depression in captivity, no field studies on natural populations
have been conducted to test the proposed effect on extinction.
However, Saccheri recently found in his study of a large metapopulation of
the Glanville .fritillary butterfly that extinction risk increased significantly
(10) with decreasing heterozygosity, an indication of inbreeding, even after
accounting for the effects of the relevant ecological factors. Rate of maturation,
larval survival, adult longevity and egg-hatching rate were found to be adversely
affected by inbreeding, and appear to be the fitness components underlying the
relationship between inbreeding and extinction. One wonders, nevertheless,
(15) how applicable these results would be to the increasing number of species with
small isolated populations due to habitat loss and fragmentation.
If the phenomenon "extinction risk increased significantly with decreasing heterozygosity" (lines 9-10) agrees with the proposed effect on extinction, the passage assumes
选项
A、heterozygosity is an indicator of increasing inbreeding depression in assimilated metapopulations
B、heterozygosity is unrelated to the degree of inbreeding depression in assimilated metapopulations
C、heterozygosity is an indicator of decreasing inbreeding depression in isolated metapopulations
D、heterozygosity is an indicator of increasing inbreeding depression in isolated metapopulations
E、heterozygosity is an indicator of decreasing inbreeding depression in assimilated metapopulations
答案
E
解析
转载请注明原文地址:https://kaotiyun.com/show/nRjO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Althoughheknewlittleaboutthelargeamountofworkdoneinthefield,hesucceeded______othermorewell-informedexperiment
EventhoughI’mquitea______person,Ilikemeetingpeople.
Tomakeupanobjectivetest,theteacherwritesaseriesofquestions,______hasonlyonecorrectanswer.
Theoldideathatchildprodigies"burnthemselves"or"overtaxtheirbrains"intheearlyyears,therefore,arepreytofailure
Chauncy,anEnglishbulldog,received1,618votesintheMr.BulldogUSAcompetition,givinghimapproximately20percentofthe
Inthetwodecadesbetween1910and1930,overtenpercenttotheBlackpopulationoftheUnitedStateslefttheSouth,whereth
Howmanyreallysufferasaresultoflabormarketproblems?Thisisoneofthemostcriticalyetcontentioussocialpolicyques
Between1970and1980,energyconsumptionbyUnitedStatesindustrypeakedandthendeclined,sothatby1980totalindustrialu
Despitethefactthatthehealth-inspectionproceduresforcateringestablishmentsaremorestringentthanthoseforordinaryre
Itwouldhavebeendisingenuousofthecandidatetoappear______whenheropponentwontheelection,butshecongratulatedthevi
随机试题
一笔交易使得资产负债表中总资产项和总负债项都减少了15000元,这可能是由下列()交易产生的。
While______,Ioftennoticethatsomestudentsareabsent-minded(心不在焉的).
A.一级召回B.二级召回C.三级召回D.四级召回E.五级召回根据《药品召回管理办法》药品生产企业在实施召回过程中,应每3日向所在地省级药品监督管理部门报告药品召回进展情况的是
计算机方式下,必须设置“收、付、转”三种凭证类别。()
()对于北极熊相当于仙人掌对于()
法治和礼治发生在两种不同的社会__________中,这里所谓的礼治也许就是通常所谓的人治,但是礼治一词不会像人治一词那样容易引起___________,以致有人觉得社会秩序是可以由个人好恶来维持的了。填入画横线部分最恰当的一项是:
在以货币为媒介的商品交换中,价值的表现形式是()。
有以下程序#includeinta=1,b=2;voidfun1(inta,intb){printf("%d%d",a,b);}voidfun2(){a=3;b=4;}main(){fun1(5,6);fun2();printf("%d%
支持子程序调用的数据结构是( )。
Choosethecorrectletter,A,BorC.MuseumworkplacementOnMonday,whatwillbethestudents’workingday?
最新回复
(
0
)