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
56
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.
Which of the following best sums up activities within an ecosystem?
选项
A、Predator-prey relationships.
B、Interactions among all members.
C、Human-animal interactions.
D、Human relationship with the environment.
答案
B
解析
属信息归纳题。根据生态系统的定义,其内部的活动应概括为所有成员之间的相互影响。
转载请注明原文地址:https://kaotiyun.com/show/mOK4777K
0
考研英语一
相关试题推荐
TheUniversityGraduationLeadsCollegesaredoingapoorjobofgraduatingHispanicstudents,nomatterhowselectivetheir
TheUniversityGraduationLeadsCollegesaredoingapoorjobofgraduatingHispanicstudents,nomatterhowselectivetheir
"Cleverness"ChargedBarbedWireNetCurrentGroup,aGermantown-basedtechnologyfirm,hastakenoveranordinarylookingh
TheBrownFatHasAlreadyHelpedtoReduceWeightFormostpeople,fatisaburden.Itdoesn’treallymatterwhereitappear
AnnetheLatestCistofSiMountainAreaDiscoversBymodernstandards,thehostilesummitofMountLlullaillaco,intheArg
PlantsFoundinAspirinSynthesisAspirinisamongthemostpopularremediesusedbypeople.Itturnsoutsomeplantslikei
TakingRubbishThestretchofthePacificbetweenHawaiiandCaliforniaisvirtuallyempty.Therearenoislands,noshippin
MarkTwainonceobservedthatgivingupsmokingiseasy.Heknew,becausehe’ddoneithundredsoftimeshimself.Givingupfor
Carmakershavelongusedsextoselltheirproducts.Recently,however,bothBMWandRenaulthavebasedtheirlatestEuropeanm
OnWednesday,incomingFinancialSecretaryDonaldTsangsaidheis"committedtotheprincipleandphilosophiesenshrinedbyhis
随机试题
对于登记离婚后,因为当事人不履行离婚协议中的财产给付、子女抚养等有关义务而发生的纠纷()
某人的无效腔容量为125ml,肺通气量为7500ml/min,呼吸频率为每分钟20次,其心输出量为5000ml时的通气/血流比值应为
A.原发性腹膜炎B.继发性腹膜炎C.两者都有D.两者都无腹腔穿刺抽得的液体为无臭混浊液体常见于
某公司的分公司以自己的名义对外签订一份买卖合同,在履行过程中因其违约发生纠纷,对方当事人诉至法院。对该合同的效力应认定()。
从一般意义上说,超过一定程度或合理限度的通货紧缩对经济发展是不利的。这种不利影响主要表现在()等方面。
一般纳税人发生的下列各项支出,应于发生时计入当期损益的有()。
劳动法律关系的()是指劳动法律关系主体依法享有的权利和承担的义务。
下列诗句与其作者对应正确的是()。
IndependentWritingDirectionsForthistask,youwillwriteanessayinresponsetoaquestionthatasksyoutostate,expl
A、Doubtful.B、Positive.C、Critical.D、Indifferent.B推断题。短文开头就说Toluker监狱与世界上其他监狱不同,并明确指出该监狱有很多不同凡响的特点(manyremarkablethings),rem
最新回复
(
0
)