首页
登录
职称英语
During the Pleistocene epoch, several species of elephants isolated on islan
During the Pleistocene epoch, several species of elephants isolated on islan
游客
2025-02-19
7
管理
问题
During the Pleistocene epoch, several species of elephants isolated on islands underwent rapid dwarfing. This phenomenon was not necessarily confined to the Pleistocene, but may have occurred much earlier in the Southeastern Asian islands, although evidence is fragmentary. Several explanations are possible for this dwarfing. For example, islands often have not been colonized by large predators or are too small to hold viable predator populations. Once free from predation pressure, large body size is of little advantage to herbivores. Additionally, island habitats have limited food resources, a smaller body size and a need for fewer resources would thus be favored. Interestingly, the island rule is reversed for small mammals such as rodents, for which gigantism is favored under insular conditions. [br] According to the passage, which of the following statements about body size in mammals is true?
选项
A、A large body is unfavorable to mammalian species’ survival under most conditions.
B、A large body tends to benefit small mammals living on islands.
C、For most herbivorous mammals, a large body size is easier to sustain in the absence of large predators.
D、Under most conditions, a small body is less beneficial to herbivorous mammals than to nonherbivorous mammals.
E、Among nonherbivorous mammals, a small body is more beneficial on an island than on a mainland.
答案
B
解析
根据最后一句可知,选项B正确。A项表述相反。C项表述相反。D项文章没有提及非食草哺乳动物。E项文章没有提及非食草哺乳动物。
转载请注明原文地址:https://tihaiku.com/zcyy/3964149.html
相关试题推荐
DuringthePleistoceneepoch,severalspeciesofelephantsisolatedonislan
DuringthePleistoceneepoch,severalspeciesofelephantsisolatedonislan
Historically,morecold-adaptedantelopespeciesoriginatinginEurasiahave
Althoughvastlypopularduringitstime,muchnineteenth-centurywomen’sfic
Seedingaforestwithnonnativespeciesafterafirecanimpedenativeplant
Recently,researchersinvestigatedtheforagingprofilesofbirdspeciesin
Recently,researchersinvestigatedtheforagingprofilesofbirdspeciesin
Therehavebeennumerouswell-documentedextinctionsofindigenousspeciesc
Therehavebeennumerouswell-documentedextinctionsofindigenousspeciesc
Ourstudyrevealedthatnest-guardinglong-tailedskinks(aspeciesoflizar
随机试题
DrivingalongSouthStreet,wheretheLosAngelessprawlmeetssprawlingOra
Astheworld’surbanpopulationgetsbigger,citiesarestrugglingtoprovid
OnSept.11,thenation’saviationsystemquicklyandsafelylandedalmost4
[originaltext]An81-year-oldmanendedupinGermanybyaccidentaftertryi
A.滑石、甘草、辰砂B.滑石、甘草、青黛C.滑石、甘草、薄荷D.滑石、甘草、香薷
1994年7月1日实施的《公司法》规定我国募集设立的公司均指向特定对象募集设立的
股东大会决议分为()。A:普通决议B:特别决议C:定期决议D:临时决议
A.儿童卡介苗的接种 B.食品卫生法制定 C.通过国际检疫防止埃伯拉病毒的传
某汽车运输公司2005年5月份的车千米产量为4.14吨千米/车千米,车辆平均吨位
A. B.u,水平指右 C. D.
最新回复
(
0
)