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
Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance o
Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance o
admin
2010-07-14
38
问题
Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity, the number of species in a particular ecosystem, to the health of the Earth and human being. Much has been written about the diversity of terrestrial (陆生的) organisms, particularly the exceptionally rich life associated with tropical rain forest habitats.
Relatively little has been said, however, about diversity of life in the sea even though coral reef systems are comparable to rain forests in terms of richness of life. An alien exploring Earth would probably give priority to the planet’s dominant, most distinctive feature—the ocean. Humans have a bias toward land that sometimes gets in the way of truly examining global issues. Seen from far away, it is easy to realize that landmasses occupy one third of the Earth’s surface. Given that two thirds of the Earth’s surface is water and that marine life lives at all levels of the ocean, the total three dimensional living space of the ocean is perhaps 100 times greater than that of land and contains more than 90 percent of all life on Earth even though the ocean has fewer distinct species.
The fact that half of the known species are thought to inhabit the world’s rain forests does not seem surprising, considering the huge numbers of insects that comprise the bulk of the species. One scientist found many different species of ants in just one tree from a rain forest. While every species is different from every other species, their genetic makeup constrains them to be insects and to share similar characteristics with 750,000 species of insects. If basic, broad categories such as phyla and classes (门和纲) are given more emphasis than differentiating between species, then the greatest diversity of life is unquestionably in the sea. Nearly every major type of plant and animal has some representation there.
To appreciate fully the diversity and abundance of life in the sea, it helps to think small. Every spoonful of ocean water contains life on the order of 100 to 100, 000 bacterial cells plus assorted microscopic plants and animals, including larvae (幼虫) of organisms ranging from sponges and corals to starfish and clams and much more.
The most probable conclusion supported by the passage would be ______.
选项
A、ocean life is highly adaptive
B、more attention needs to be paid to preserving ocean species and habitats
C、ocean life is primarily composed of plants
D、the sea is highly resistant to the damage done by pollutants
答案
B
解析
推理题。根据文章第一段,人们对物种的加速消失日益关切,而目前人类对海洋生物的多样性认识不足,因此推断出更应该保护海洋物种。
转载请注明原文地址:https://kaotiyun.com/show/rE7K777K
0
大学英语六级
相关试题推荐
Directions:Forthispart,youareallowedthirtyminutestowriteashortessayentitledGoodMannersYoushouldwriteatleast
SinceIboughtacomputerlastmonth,anewworldhasopenedupbeforeme,aworldthatreachesfarbeyondmyimmediatesurroun
A、Shethinksthatheshouldplanhismoneymorecarefully.B、Shethinksthatheshouldbuyaconvertible.C、Shethinksthathes
A、Tocancelhistrip.B、Tocatchalaterflight.C、Togotobedearly.D、Toaskforawake-upcall.D4个选项都是动词不定式短语,说明本题是计划行为题或建议
A、Theywillbemuchbigger.B、Theywillhavemoreseats.C、Theywillhavethreewheels.D、Theywillneedintelligentdrivers.C
TheearlyEuropeansettlementisalongoneofourwell-knownrivers--which【B1】______intotheAtlantictoformNewYorkbay.The
Tobesuccessfulinajobinterview,youshould【B1】______certainandprofessional【B2】______.Youneedtocreateagood【B3】___
A、Housepainter.B、Salesman.C、Mailman.D、Milkman.A本题的关键是男士自己说的话:“…,Icanstarttopaintyourhousetomorrow.”由此可以推断他的职业是house
A、Thecookstherearenotwell-trained.B、Notallthecondiments(佐料)canbefoundintheU.S.C、Thecookingmethodshavebeenm
Morethan2,300universitiesinover100countrieshaveintroducedChinesecoursestotheircurricula,andyoungoverseasnation
随机试题
基础代谢率测定的基本原理是()
夏月感冒,发热恶寒,头痛无汗当选用()(1999年第32题)
拔牙术引发细菌性心内膜炎的致病菌是()
A.硬脂酸钠B.苯扎溴铵C.卵磷脂D.聚乙烯醇E.聚山梨酯80通式为RNH3+X-的阳离子表面活性剂是()。
在古代和近代传统经济社会中,土地作为最重要的生产资料,其权利内容集中体现在土地()上。
下面关于单侧和双侧假设检验的说法,正确的有()。
马克思在1857年的《波斯与中国》中写道:“简单地说,我们不要像骑士般的英国报纸那样去斥责中国人可怕的残暴行为,最好承认这是保卫社稷和家园的战争,这是保存中华民族的人民战争。”在这段话里,马克思()。
2015年9月15日,网友在微博上爆料称,在B市某知名餐馆的包子中吃出蟑螂,并附有一张包子底部粘着蟑螂的照片。该网友表示,“吃包子的时候看着点!发现有蟑螂找他去退态度极其恶劣,太恶心了”。无独有偶,一个月后,另一名网友发布微博,称在该餐馆另一分店的醋里吃出
教育经验汇编多为教育实践经验的汇集,它同时也揭示了教育规律。()
Wehearitalotthenewsthesedays:"Recyclenewspapersandsaveatree.Collectbottlesandcanssotheycanbereusedin
最新回复
(
0
)