首页
登录
职称英语
Scientists have long speculated as to the extent that inbreeding cont
Scientists have long speculated as to the extent that inbreeding cont
游客
2025-02-22
17
管理
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. [br] 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://tihaiku.com/zcyy/3967220.html
相关试题推荐
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistshavelongsoughtthereasonsfortherelativelyyoungage
Scientistshavelongsoughtthereasonsfortherelativelyyoungage
Scientistshavelongsoughtthereasonsfortherelativelyyoungage
Somescientistshaveconcludedthatnarcolepsy,adiseasewhichdis
Somescientistshaveconcludedthatnarcolepsy,adiseasewhichdis
Somescientistshaveconcludedthatnarcolepsy,adiseasewhichdis
Somescientistshaveconcludedthatnarcolepsy,adiseasewhichdis
Althoughscientistshave______longthehumanappendixas______organ,thereisa
随机试题
[originaltext]W:Hey,Mark,couldyoutellmeaboutthefirstjobyoueverhad?
Thedirectraysofthesuntouchtheequatorandstrikenorthwardtowardtit
哪种两性畸形患者多有Turner综合征躯体表现A.混合性生殖腺发育不全 B.单
古代提出“学而时习之,不亦说乎”的著名教育家、思想家是()。A.孟子 B.老子
下列各项中,属于存货发出业务实质性审查程序的有()A.评估生产计划编制的科学性
关于急性小儿阑尾炎说法错误的是A.右下腹体征典型 B.穿孔率高 C.病情发展
下列关于气体灭火系统组件安装要求的说法,不正确的是()。A.管道末端应采用防晃
中国A公司与甲国B公司签订货物买卖合同,约定合同争议提交中国C仲裁委员会仲裁,仲
在收到施工图审查机构审查合格的施工图设计文件后,()应及时主持召开图纸会审会议
根据《水电工程验收管理办法》(国能新能〔2015〕426号),工程截流验收,
最新回复
(
0
)