首页
登录
职称英语
It is usually claimed that species-rich ecosystems tend to be more stable th
It is usually claimed that species-rich ecosystems tend to be more stable th
游客
2024-01-02
11
管理
问题
It is usually claimed that species-rich ecosystems tend to be more stable than species-poor ecosystems. Three mechanisms by which higher diversity increases ecosystem stability have been proposed. First, if there are more species in an ecosystem, then its food web will be more complex, with greater redundancy among species in terms of their nutritional roles. In other words, in a rich system if a species is lost, there is a good chance that other species will take over its function as prey, predator, producer, decomposer, or whatever role it played. Second, diverse ecosystems may be less likely to be invaded by new species, notably exotics (foreign species living outside their native range), that would disrupt the ecosystem’s structure and function.
Third, in a species-rich ecosystem, diseases may spread more slowly because most species will be relatively less abundant, thus increasing the average distance between individuals of the same species and hampering disease transmission among individuals
.
Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
选项
A、In any ecosystem, as the number of individuals in the same species increases, the rate of disease transmission slows down.
B、Ecosystems that have a small number of different species tend to be disease-free, because the species’ habitats are at a safe distance from each other.
C、In ecosystems with many species, diseases spread more slowly because there are fewer individuals in a species and, as a result, the individuals are more widely scattered.
D、The average distance between individuals in a species-rich ecosystem increases, so diseases are prevented from being communicated between species.
答案
C
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3327679.html
相关试题推荐
TheflavorofasaladoilisAusuallyenhancedbythefoodsBthatarepreserved
AnautisticchildusuallyAappearancetogothroughhisBearlydevelopmentCnorm
_____aunicycleusuallyrequiresmorepracticethanlearningtoswimdoes.A、Lear
Palpitationsareusuallyreportedasaflutteringinthechestorafeelingthat
Palpitationsareusuallyreportedasaflutteringinthechestorafeelingthat
Itisusuallyclaimedthatspecies-richecosystemstendtobemorestableth
Thevillagesandtownswereusuallyperchedontheedge[ofthefarms]soasnot
Thethirdquarteroftheeighteenthcenturysawtheremarkableandunstablespec
Accordingtotheweatherforecast,whichisusually______,itwillsnowthisaf
EversinceitwasclaimedthatamedicinemadefromtheChinesethree-stripe
随机试题
TheTruthaboutLyingRickyGervais’snewfilm,TheInv
不侵入气管就能进行IPPV机械通气的人工气道有()A.异型气管导管 B.面
有一种新合成的化学物质,拟应用于化妆品中,在此之前需要进行安全性评价。毒理学安全
固体分散体具有速效作用是因为()。A:载体溶解度大 B:药物溶解度大 C:
A.吐物清稀无味 B.吐物秽浊不洁 C.吐物未化,味酸腐 D.呕吐黄绿苦水
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
边缘计算指的是在网络边缘结点来处理、分析数据。边缘结点指的就是在数据产生源头和云
董事会应根据商业银行情况单独或合并设立其专门委员会,如()A.战略委员会
既清肝明目,又润肠通便的药是A.决明子 B.火麻仁 C.蔓荆子 D.青葙子
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)