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
2021-06-15
94
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 guessed, decomposers, like bacteria, step in to break down the waste excreted from animals and the remains of other organisms. Once 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 more 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 carrying capacity. Once food 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 the article, ______ has three ways to control the balance of the ecosystems.
选项
A、human beings
B、the environment
C、animals and plants
D、nature
答案
D
解析
本题考查文章细节,通过文章最后一句的“自然以三种方式控制生态系统的平衡”可知,正确选项为D。
转载请注明原文地址:https://kaotiyun.com/show/gwTO777K
0
考博英语
相关试题推荐
Helengroupsallpeopleintotwo______:thoseshelikesandthoseshedislikes.
Theylayalmostflatand______throughthetube-likeundergroundpassage.
Aswim-learnermustfirstlearnhowto______themovementsofhislimbsbeforehecanswimproperly.
Sheaccidentallyswallowedthepoisonanddeathwas______(2004年湖北省考博试题)
Infearfortheirlivesandin______oftheirfreedom,thousandsofenslavedwomenandchildrenfledtotheNorthernStatesont
Motherwassoweakafterheroperationthatthedoctorswonderediftheywouldbeableto______herthrough.
Theoldwomanistoo______aboutotherpeople’sbusiness.
She______atthethoughtofbeingpartedfromherfamilyforsolong.(2007年中国矿业大学考博试题)
Itdisgustedhimwhenatheistsattackedreligion:hethoughttheywerevulgar.(2004年中国社会科学院考博试题)
Ifcostscontinueto______,thestatewillnotbeabletoaffordthisschemeforlong,anditwillbecomeunpopular.(2013年10月中国科
随机试题
合同转让是合同内容发生变化,不是合同主体的改变。()
A.黄芩B.金银花C.大青叶D.鱼腥草E.黄连具有抗心律失常、抗心肌缺血作用的药物是
基金管理公司董事会在审议聘请或变更会计师事务所事项时,须经独立董事半数以上的同意。()
甲公司是一家2012年在A股上市的电脑公司,是集设计及制造主板机、个人电脑及笔记本电脑等产品销售、组装兼容机、硬件维修于一体的技术实力型企业。甲公司一直致力于为客户提供最优质的服务,所以其产品质量及服务态度都在行业中名列前茅。因此,甲公司各项业务发展迅速,
材料价格差异产生的原因主要有()。
湘赣边界于()年9月9日爆发了秋收起义。
形式公正:指个人或权力机关对同样的事件平等对待,以及对所有人按统一标准(而不是根据个人或所从属的特殊集团的立场)施加管束。根据上述定义,下列属于形式公正的是()。
在这个时代,人与人之间虽然在空间和情感上越来越________,但是每个人的利益却又________地与他人的利益和行为紧密地联系在一起。这促成人们主动参与公共事务,呼吁维护公共利益。依次填入画横线部分最恰当的一项是()。
Scienceanditspracticalapplicationsintheformoftechnology,orthe"science"oftheindustrialarts,asWebsterdefinesth
Theyare______studentsthattheyallperformedwellinthenationwideexaminations.
最新回复
(
0
)