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
外语
Who would have thought we would become a planet of "ologies"? There’s biology, psychology, herpetology, etymology, and geology j
Who would have thought we would become a planet of "ologies"? There’s biology, psychology, herpetology, etymology, and geology j
admin
2014-01-13
64
问题
Who would have thought we would become a planet of "ologies"? There’s biology, psychology, herpetology, etymology, and geology just to name a few. However, one "ology" truly helps us to understand the most part of our planet, our environment. Ecology(which is filled with ecologists)is the study of ecosystems and the beings and organisms that inhabit those ecosystems. Just think, in condition of bees, deer and other organisms, you are important to ecologists.
Ecosystems are communities that vary in size and location. They can be as small as a patch of glass or as large as the entire biosphere. The many varieties of plants and animals that exist in our planet ecosystems are important to our ecosystems. Plants in particular provide oxygen and nutrients all organisms need to survive. These producers have the ability to use the sun’s energy to produce food(think photosynthesis). This is where the animals and consumers become important. The animals get their energy by eating the plants and other organisms within the ecosystem. Without the producers and consumers, decomposers would not have a job. As you may have guests, decomposers, like bacteria, step in broken down, the organic materials are absorbed by the soil and gases are sent back into our atmosphere. The whole process is ready to start again through the Earth’s natural cycles. There has to be a balance of producers, consumers, decomposers in order to remain a balanced ecosystem.
Remember, all organisms need matter and energy to survive. An ecosystem is balanced when matter and energy move efficiently through those ecosystems. Just as your backpack has a limit on the number of huge textbooks it can carry at any given time, all ecosystems have a limit on the populations they can maintain. Carrying capacity is the largest population an ecosystem can support at any particular time. The support of this population depends on the amount of resources(matter and energy)that are available and the movement of those resources within that ecosystem. If energy and matter are moving efficiently through an ecosystem, then the current population of plants and animals has not reached beyond the ecosystem’s the ecosystem’s carrying capacity. Once resources dwindle or animal populations increase dramatically, the ecosystem may not be able to support those populations. Fortunately, nature has three ways to control the balance of ecosystems: ecological responses to change, energy transfer, and food chains and food webs.
According to this article, the ecosystems______.
选项
A、are in danger of being destroyed
B、are very small in size
C、refer only to the entire biosphere
D、vary greatly in size and location
答案
D
解析
事实细节题。文章中第二段第一句话提到“生态系统大小和位置不同的生物群”,与D选项意思相同。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/JehO777K
0
考博英语
相关试题推荐
TheAmericanConstitutionwaswrittenforpeoplethatareabletogovernthemselves.JohnAdamswrote,"OurConstitutionwasmad
【B1】ThemainimpressiongrowingoutoftwelveyearsonthefacultyofamedicalschoolisthattheNo.1healthproblemintheU
Theeffectofthebabyboomontheschoolshelpedtomakepossibleashiftinthinkingabouttheroleofpubliceducationinthe
Theeffectofthebabyboomontheschoolshelpedtomakepossibleashiftinthinkingabouttheroleofpubliceducationinthe
Dianamadealotofefforttopersuadeherparentsinto______tohergoingtotheUnitedStatestostudybusinessadministratio
Isawatelevisionadvertisementrecentlyforanewproductcalledanairsanitizer.Awomanstoodinherkitchen,sprayingthe
Gorillasandchimpanzeespossessarudimentaryspeechcenterwithintheirbrainsthatuntilnowwasthoughttobeuniquetohuma
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,thisisnotalwaysthe【C1】______.Take,forinstance,th
Duetosluggishmarketconditions,thefactory’sworkforcehas____fromover4,000toafewhundred.
Newtechnologylinkstheworldasneverbefore.Ourplanethasshrunk.It’snowa"globalvillage"wherecountriesareonlyseco
随机试题
一婴儿能独坐,并坐得很稳,但不会爬,能无意识地发出复音,认识生熟人,不能听懂自己的名字。人工喂养时,下列哪一点是不恰当的
患者积块软而不坚,固定不移,胀与痛并存,舌苔薄,脉沉实。其证候是
一流行性出血热传染源主要是( )霍乱传染源主要是( )
函数在x处的微分为()。
根据《水利工程质量监督管理规定》,工程质量检测是()的重要手段。
清洁工作日常管理由日检、月检及()组成,其中日检应覆盖小区主要室内外公共区域。
马斯洛需要层次论中的最高层次是()。
处理民族关系,我国坚持()的基本原则。
近年来的高考作文命题,在朝材料作文方向转变,旨在鼓励学生独立思考,自由表达,这是一个积极的改革方向,可是,材料作文却遭遇学生缺乏思考能力的________。去年高考作文,不独全国卷I的作文,其他一些省市的作文也被________。填入画横线部分最恰当的一
在VisualFoxPro中,报表的数据源不包括
最新回复
(
0
)