首页
登录
职称英语
Historically, more cold-adapted antelope species originating in Eurasia have
Historically, more cold-adapted antelope species originating in Eurasia have
游客
2025-02-19
24
管理
问题
Historically, more cold-adapted antelope species originating in Eurasia have migrated into Africa, where the climate is generally warmer, than have warm-adapted African species into Eurasia. A likely explanation for this involves the fact that intercontinental migrations require both a land bridge connecting the two continents and the suitable habitat both on and across that land bridge. During periods of climatic cooling, such as the various ice ages, the land bridge is open for a long time (because sea level remains low) and is usable by cold-adapt species because cool habitats then extend across it. Thus during cooling most migrants would be expected to travel toward Africa, which is near the equator, since this is the direction dictated by habitat changes on a cooling Earth. In contrast, when the Earth is warm, the land bridge is reduced or gone because sea level is relatively high then. Only during the short lag between onset of global temperature change and sea level response can warm-adapted species migrate from the equator toward higher latitudes. [br] The author of the passage implies that during the “short lag”, a land bridge between Africa and Eurasia would
选项
A、be inhabited primarily by species of antelope originating in Eurasia
B、be characterized by areas of widely varying elevation above sea level
C、be inhabited by a wide diversity of antelope species
D、contain habitats that could sustain warm-adapt antelope species
E、contain habitats similar to habitats at much higher latitudes in Eurasia
答案
D
解析
根据文章,在short lag期间,适应于温暖气候的羚羊可以迁徙到欧亚大陆,这意味着这个时期的大陆桥包含有适合这种物种的栖息地。A项应该是被起源于非洲的物种居住。
转载请注明原文地址:https://tihaiku.com/zcyy/3964109.html
相关试题推荐
Historically,morecold-adaptedantelopespeciesoriginatinginEurasiahave
Historically,morecold-adaptedantelopespeciesoriginatinginEurasiahave
EarlynaturalistsbelievedtwospeciesofbeaverlivedinNorthAmerica:dam
MigratorysongbirdsbreedinginEurasia’stemperateforestsdependonasumm
Seedingaforestwithnonnativespeciesafterafirecanimpedenativeplant
Recently,researchersinvestigatedtheforagingprofilesofbirdspeciesin
Recently,researchersinvestigatedtheforagingprofilesofbirdspeciesin
Recently,researchersinvestigatedtheforagingprofilesofbirdspeciesin
Ourstudyrevealedthatnest-guardinglong-tailedskinks(aspeciesoflizar
Becausedifferentmammalianspeciesfavordifferentenvironments,identifyin
随机试题
IfitisnowJune,whatmonthwillitbe400monthsfromnow?A、JanuaryB、AprilC
Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth
你认为做游戏能对幼儿产生教育作用吗?
债势的到期收益率(YTM)是使得未来现金流现值等于债券当前价格的贴现率。()
某市为了建设公益设施,依照法定程序将某村的土地征为国有。后由于资金短缺,该建设项
目前我国企业对外投资的主要形式有( )。A:到国外直接投资建厂 B:开展境内
城镇包括城区和镇区,属于镇区的是()。A.市辖区和不设区的市(包括不设区的地
新民主主义革命的动力包括无产阶级、农民阶级、城市小资产阶级和民族资产阶级。其中,
在药品零售企业中,人员资质要求为“应当具有执业药师资格”的是A.法定代表人或企业
强心苷最常见的早期心脏毒性反应是A.室上性心动过速 B.二联律 C.室性期前
最新回复
(
0
)