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
70
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
Criticsofearlyschoolingciteresearchthatquestionswhether4-year-oldchildrenarereadytotakeonformallearning.Educat
AlmosteverydaythemediadiscoversanAfricanAmericancommunityfightingsomeformofenvironmentalthreatfromlandfills,g
Somepeoplethinkit’s______tosmokewithacigaretteholder.
Theeffectofthebabyboomontheschoolshelpedtomakepossibleashiftinthinkingabouttheroleofpubliceducationinthe
Thirty-onemillionAmericansareover60yearsofage,andtwenty-ninemillionofthemarehealthy,busy,productivecitizens.By
Inrecentyears,Israeliconsumershavegrownmoredemandingasthey’vebecomewealthierandmoreworldly-wise.Foreigntravelis
SomeAfricanAmericanshavehadaprofoundimpactonAmericansociety,changingmanypeople’sviewsonrace,historyandpolitic
Animportantpointinthedevelopmentofagovernmentalagencyisthecodificationofitscontrollingpractices.Thestudyofl
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,thisisnotalwaysthe【C1】______.Take,forinstance,th
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,thisisnotalwaysthe【C1】______.Take,forinstance,th
随机试题
主要受人的生物因素影响,随着年龄老化有降低趋势的智力种类是()
《诗经》中的“风”按照地域分为十五国风《氓》所属的是()
叶片水浸展开后,呈宽卵形或心脏形,透光可见黑色或棕色条纹。此药材是
半夏的性味是
男,62岁。缺失,可摘局部义齿初戴后1个月,咀嚼时常咬颊黏膜,下颌舌侧第一磨牙至磨牙后垫区压痛,来院复诊。咬颊黏膜的原因可能是
城市生态系统是一门特殊的生态系统,以下对城市生态系统的认识不正确的是()。
阳光控制镀膜玻璃具有以下性能( )。
低压二氧化碳灭火系统储存装置的报警功能正常,高压报警压力设定值应为()MPa。
下列项目中,应计入存货成本的有()。
世界盐度最低的海区是:
最新回复
(
0
)