首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
An ecosystem is a group of animals and plants living in a specific region and interacting with one another and with their physic
An ecosystem is a group of animals and plants living in a specific region and interacting with one another and with their physic
admin
2015-02-12
59
问题
An ecosystem is a group of animals and plants living in a specific region and interacting with one another and with their physical environment. Ecosystems include physical and chemical components, such as soils, water, and nutrients that support the organisms living there and the interactions among all organisms in a given habitat. People are part of the ecosystems where they live and work. Human activities can harm or destroy local ecosystems unless land development for housing or businesses is carefully planned to conserve and sustain the ecology of the area.
The "natural succession" of plant and animal communities refers to the changes in animal and plant life of a region as a result of environmental changes. With changes in environment, the previous animal and plant life disappears and is succeeded by new types, adapted to new conditions. A knowledge of succession is very important in tackling the problem of conservation. For example, if a forest is destroyed, the mosses and ferns of that forest, requiring shade, and the forest animals, requiring protection and food, will disappear and be replaced by insects and other animals common to the grassland and shrub area that had preceded the forest.
We need to use traditional methods of soil conservation. Planting of terracing to strip cropping, all bind the soil and absorb rain runoff, preventing land erosion. We currently over-rely on high yield farming that shows disregard for ecology. It is an understanding of succession that keeps nature in balance. When we manipulate the land in an unnatural way, using chemicals and indiscriminate logging we are showing our ignorance of natural succession.
An ecosystem can most accurately be defined as a______.
选项
A、geographical area
B、community
C、habitat
D、protected environment
答案
B
解析
属概念理解题。文章第一句提供的“生态系统”的定义为:“生活在特定区域、彼此之间以及和自然环境之间相互影响的动植物群体。”所以,生态系统是一个群落,即community。
转载请注明原文地址:https://kaotiyun.com/show/hOK4777K
0
考研英语一
相关试题推荐
Kunmingisusuallycoolinthesummer,butShanghai______.
TheSouthPoleTravelsofStabilityItisnotquiteBenidormyet,butAntarcticahasbecomeanincreasinglypopulardestinat
TheGovernmentsAggressiveDealingswithU.S.AutomakersIntheory,agovernmentbailoutshouldprovideashort-terminfusio
VideoGameandChildtheSchoolExpressResearchersaretryingtotellparentssomethingaboutwhatkindsofvideogameschi
EmergingEconomicPowerfulCountryAfterEconomicCrisisItisbecomingincreasinglyclear-thatthestoryoftheglobalecon
TheUncertaintyofChildBehaviorPerformanceHypothetically,let’ssayyouranafancyprivateelementaryschool.Likeothe
"Youarenotheretotellmewhattodo.YouareheretotellmewhyIhavedonewhatIhavealreadydecidedtodo,"MontaguNor
Massproduction,thedefiningcharacteristicoftheSecondWaveeconomy,becomesincreasinglyobsoleteasfirmsinstallinformat
NetworkInformationSafetyinSchoolUniversityletterstostudentsandalumniareusuallycheerful.ButtheUniversityofC
Iwas13whenBenjicameintoourlives.Withhisdeepbrowneyes,floppyearsandcheerfuldisposition,hewasmyconstantcomp
随机试题
张老师撰写了一篇学术论文,拟投稿于大学学报,发表之前需要根据学报要求完成论文样式排版。根据考生文件夹下“Word素材.docx”完成排版工作,具体要求如下:依据“论文正样1格式.jpg”中的标注提示,设置论文正文前的段落和文字格式。并参考“论文正样1.
我国《反不正当竞争法》规定,附奖促销所附最高奖的绝对额度是人民币。【】
劳力性日射病常见于
暴风客热最早见于:天行赤眼最早见于:
平面系数K是指( )。
基金募集失败,基金管理人应当自募集届满后( )日内返还投资者已缴纳的款项,并加计银行同期存款利息。
下列实验方案中,能达到实验目的的是()。
2007年10月15日至21日,中国共产党第十七次全国代表大会在北京召开。大会的主题是:高举()伟大旗帜,以邓小平理论和“三个代表”重要思想为指导,深入贯彻落实()。继续解放思想,坚持改革开放,推动科学发展,促进社会和谐,为夺取全面建设
(95年)
Whatifarchitectscouldbuildlivingsystemsratherthanstaticbuildings—dynamicstructuresthatmodifytheirinternalande
最新回复
(
0
)