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
43
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, the word "producers" (Line 4, Paragraph 2) refers to______.
选项
A、plants
B、animals
C、ecologists
D、consumers
答案
A
解析
本题考查对文章细节的理解。文章第二段第四句提到“特别是植物,它提供所有生物生存所需的氧气和营养”。因此,本题选A。
转载请注明原文地址:https://jikaoti.com/ti/oPxYFFFM
0
考博英语
相关试题推荐
Inthelastfewminutestheconversationhasbecomeseemingly______asifthediscussionwereofsomeminordomesticmatterand
Iftheexpertadviceismorepositive,willtheparentsbeableto______attitudeswhichhavebuiltupoverdecadesinafewdays
Idon’tlikefootball,butsomepeopleare______aboutit,whichisbeyondmycomprehension.
Chemistryisclosely______withotherstudies:physics,biologyandsoon.(2002年春季上海交通大学考博试题)
TheJapanesepersonnelmanagerhadto______keepingachemistonthepayrolleventhoughthecompanynolongerneededhisexper
Thedisagreementovertraderestrictionscouldseriously______relationsbetweenthetwocountries.(2015年北京航空航天大学考博试题)
’GangnamStyle’,the______popularsongfromSouthKoreanrecordingartistPSYhasjustbecomethemostwatchedvideoonYouTub
PeopleweresurprisedtofindthatMr.Johnsonhadtheabilityto______everythinghewasinvolvedin.
InNovember1987thegovernment______apublicdebateonthefuturedirectionoftheofficialsportspolicy.(2008年四川大学考博试题)
Thereasonwhyhedidn’ttaketheexamwas______hehadanaccidentonhiswaytotheschool.
随机试题
交易磋商程序中必不可少的两个法律环节是()。
下列财产中应当归国家所有的是()。A.失散的饲养动物B.遗失物C.所有人不明的埋藏物、隐藏物D.漂流物
A.生长激素B.糖皮质激素C.肾上腺素D.甲状腺激素影响神经系统发育最重要的激素是
有关腕骨和手关节的叙述,错误的是
我国妇女最常见的骨盆类型是
在融资租赁形式下,租人固定资产产生的租赁费用作为当期的费用处理。()
所得税费用的简便计算方法是怎样得到的?
某上市公司因减资原因按每股15元回购本公司股票300万股,该股票为溢价发行,发行价格每股4元(假定不考虑发行手续费)。回购时,公司股本为50000万股,每股面值1元,资本公积为1200万元,盈余公积为7500万元。回购后,该公司的盈余公积为()万元
【2013下】李老师设计了一个“三只蝴蝶”的游戏活动。她选了三名幼儿扮演蝴蝶,又选了若干名幼儿扮演花朵。结果幼儿兴趣不高,表现被动,还没等游戏结束,一个幼儿就问李老师:“老师,游戏完了吗?我们可以自己玩了吧。”针对这种现象,请从幼儿游戏特征和游戏
OnSunday,JimwentwithhisfarthertochooseaChristmastree.Theyputitinthemiddleofthesittingroom.
最新回复
(
0
)