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
2025-02-19
19
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:https://tihaiku.com/zcyy/3964277.html
相关试题推荐
55.Acertainspeciesofbirdhastwobasicvarieties,crestedandnoncrested.Th
Caterpillarsoffallspeciesproduceanidenticalhormonecalled"juvenilehormo
Hereisanewideainagriculturalweedcontrol.Ratherthantryingtoformulate
FilmProsellsmillionsofvideocassettesdirectlytoconsumersat$25apiecefor
Theskullsandpelvicbonesofsomespeciesofdinosaursharecharacteristicswi
David:Sinceattemptingtopreserveeveryspeciesthatiscurrentlyendangeredi
Onemethodofdatingtheemergenceofspeciesistocomparethegeneticmaterial
Justasplantspeciesnativetoregionswithbrowsingmammalsevolvedmanynatur
Invirtuallyalltypesoftissueineveryanimalspecies,dioxininducesthepro
Unlikemostwarblerspecies,themaleandfemaleblue-wingedwarblerareverydi
随机试题
Marriedpeoplelive"happilyeverafter"infairytales,buttheydosoless
下面对图像后处理的描述,错误的是A.多平面重建是三维图像 B.最大密度投影只显
影响旅客运输需求的主要因素有()。A.社会经济发展水平 B.居民生活水
与酸性焊条相比,碱性焊条焊接时所表现出的特点为()。A:能够有效地消除焊缝金属
在社会主义市场经济逐步建立与完善的过程中,政府机构改革的声音与步伐始终伴随,建立
某厂新建一条大型汽车生产线建设工程,内容包括:土建施工、设备安装与调试、钢结构工
以下关于肾小管分泌的表述错误的是A.需要能量B.需要载体C.有饱和和竞争抑制现象
去过几次小朋友的家,就能画出具体的路线图来,认知发展到哪一阶段的儿童能做到这种程
以下情形中不予医师执业注册的是A.不具有完全民事行为能力的 B.受吊销医师执业
在“一通三防”管理制度中,不属于“三防”范畴的是()。A.防透水 B.防瓦斯
最新回复
(
0
)