首页
登录
职称英语
Ecologists study how millions of species share the world, rather than take o
Ecologists study how millions of species share the world, rather than take o
游客
2024-01-10
48
管理
问题
Ecologists study how millions of species share the world, rather than take on the whole planet at once; they generally focus on a single ecosystem, be it a prairie, a tidal flat, or a sand dune. Even within those limits, they are frustrated by
porous frontiers
. As a result, ecologists have done some of their most important work on islands, nature’s own isolated laboratories, which may be colonized only a few times over the course of millions of years. On them, ecologists have figured out how the size of a given habitat determine how many species it can support. They have then applied that knowledge to the mainland, showing how fragmented ecosystems become like archipelagoes, where extinctions can strike. [br] In the context in which it appears, “isolated" most nearly means
选项
A、completely uncontaminated
B、somewhat unusual
C、extremely rare
D、relatively inaccessible
E、strictly confined
答案
D
解析
根据文章,isolated岛屿指的是只被占领过几次的地方,因此是”不易进入的”,所以选项D正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3349715.html
相关试题推荐
Whyshouldthegovernment,ratherthanindustryoruniversities,providethemon
Anexperimentalmicrowaveclothesdryerheatsneitherairnorcloth.Rather,it
Caterpillarsoffallspeciesproduceanidenticalhormonecalled"juvenilehormo
WhenamphibiansfirstappearedonEarthmillionsofyearsago,theamountofult
Hereisanewideainagriculturalweedcontrol.Ratherthantryingtoformulate
FilmProsellsmillionsofvideocassettesdirectlytoconsumersat$25apiecefor
David:Sinceattemptingtopreserveeveryspeciesthatiscurrentlyendangeredi
Themostfavorablelocationsforthegrowthofglaciers,ratherthanbeingthec
Usingthetechniquesemployedbygeneticengineering,anewspeciesofmicroorga
Domesticautomobilemanufacturershaveinvestedmillionsofdollarsintoresearc
随机试题
PlantandAnimalLifeofthePacificIslandsP1:ThePacificIslandsregioncove
OnlyaftertheACivilWarhadstartedBLincolnissuedtheEmancipationProclamat
小学心理健康《做合格的小公民》 一、考题回顾
承包人质量责任包括()。A.应当依法取得相应等级的资质证书,并在其资质等级
BIM技术在概念设计中应用主要体现在()A.空间设计 B.饰面装饰初步设计
左边给定的是纸盒的外表面,下列哪一项能由它折叠而成:
Thechangeinthatvillagewasmiraculou
女性,56岁,高血压、糖尿病史3年,突发胸前区疼痛3小时入院。心电图标准12导联
中国生产者价格指数包括( )。A.工业生产者出厂价格指数 B.工业生产者购进
影响农产品需求的直接因素是()。A.收入水平 B.农产品价格 C.相关产品
最新回复
(
0
)