首页
登录
职称英语
Coincident with concerns about the accelerating loss of species and habitats
Coincident with concerns about the accelerating loss of species and habitats
游客
2025-04-06
22
管理
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 beings. Much has been written about the diversity of terrestrial 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 the 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 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 are given more emphasis than differentiating between species, then the greatest diversity of life is unquestionably the sea. Nearly every major type of plant and animal has some representation there.
To appreciate fully the diversity of 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 larva’s or organisms ranging from sponges and corals to starfish and clams and much more. [br] Why does the author compare coral reefs with rain forests(Para. 1)?
选项
A、They share many similar species.
B、They are approximately the same size.
C、Most of their inhabitants require water.
D、Both have many different forms of life.
答案
D
解析
作者为什么把珊瑚礁同雨林进行比较?因为二者都含有多种生物。第一段末尾说,就生物的丰富程度而言,珊瑚礁可以同雨林相比。
转载请注明原文地址:https://tihaiku.com/zcyy/4028746.html
相关试题推荐
Coincidentwithconcernsabouttheacceleratinglossofspeciesandhabitats
Coincidentwithconcernsabouttheacceleratinglossofspeciesandhabitats
Thelivelihoodofeachspeciesinthevastandintricateassemblageoflivin
Thelivelihoodofeachspeciesinthevastandintricateassemblageoflivin
Thelivelihoodofeachspeciesinthevastandintricateassemblageoflivin
Therearedifferent______ofbooksinalibrary.(2007年中国矿业大学考博试题)A、speciesB、bio
Inancienttimes,somecatastrophicextinctionofspeciesoccurred______.(2004年武
SomeoftheconcernssurroundingTurkey’sapplicationtojointheEuropeanU
SomeoftheconcernssurroundingTurkey’sapplicationtojointheEuropeanU
SomeoftheconcernssurroundingTurkey’sapplicationtojointheEuropeanU
随机试题
CrossCulturalAdvertisingAsuccessfulcrossculturaladvertisingcampaignlarg
WhichofthefollowingisNOTtrueaccordingtothepassage?[br][originaltext
ThePowerofSelf-talkⅠ.Ourlife1)li
[originaltext]M:HaveyoueverusedanyoftheservicesofferedbytheCareerS
Peoplecouldeatmorecocoa-richproductssuchasdarkchocolatebutnotdri
大跨度屋盖结构体系指跨度()m的屋盖结构。A.>60 B.≤30 C.≥
银行从业人员行应(),自觉抵制低价倾销、诋毁同业、虚假宣传等不正当竞争行为。A
真正意义上的的个人理财生涯从( )开始。A.探索期 B.建立期 C.稳定期
下列关于砌筑砂浆的叙述,正确的有( )。A.砌筑砂浆的分层度不得大于30mm,确
晚期子宫内膜癌患者,为暂时控制病情进展,应选用A、放疗 B、化疗 C、放疗+
最新回复
(
0
)