首页
登录
职称英语
The biosphere is the name biologists give to the sort of skin on the surface
The biosphere is the name biologists give to the sort of skin on the surface
游客
2025-04-17
19
管理
问题
The biosphere is the name biologists give to the sort of skin on the surface of this planet that is inhabitable by living organisms. Most land creatures occupy only the interface between the atmosphere and the land;birds extend their range for a few hundred feet into the atmosphere;burrowing invertebrates (无脊椎动物) such as earthworms may reach a few yards into the soil but rarely penetrate farther unless, it has been recently disturbed by men. Fish cover a wider range,from just beneath the surface of the sea to those depths of greater than a mile inhabited by specialized creatures. Fungi (真菌) and bacteria are plentiful in the atmosphere to a height of about half a mile,blown there by winds from the lower air. Balloon exploration of the stratosphere (同温层) as long ago as 1936 indicated that moulds and bacteria could be found at heights of several miles,recently the USA’s National Aeronautics and Space Administration has detected them,in decreasing numbers,at heights up to eighteen miles. They arc pretty sparse at such levels, about one for every two thousand cubic feet, compared with 50 to 100 per cubic foot at two to six miles (the usual altitude of jet aircraft),and they are almost certainly in an inactive state. Marine bacteria have been detected at the bottom of the deep Pacific trench,sometimes as deep as seven miles; they are certainly not inactive. Living microbes have also been obtained on land from cores of rock drilled (while prospecting for oil) at depths of as much as 1,200 feet. Thus we can say, disregarding the exploits of astronauts, that the biosphere has a maximum thickness of about twenty-five miles. Active living processes occur only within a compass of about seven miles,in the sea, on land and in the lower atmosphere, but the majority of living creatures live within a zone of a hundred feet or so. If this planet Were sealed down to the size of an orange,the biosphere,at its extreme width,would occupy the thickness of the orange-colored skin,excluding the pith.
In this tiny zone of our planet takes place the multitude of chemical and biological activities that we call life. The way in which living creatures interact with each other, depend on each other or compete with each other, has fascinated thinkers since the beginning of recorded history. Living things exist in a fine balance which is often taken for granted, from a practical point of view, things could not be otherwise. Yet it is a source of continual amazement to scientists because of its intricacy and delicacy. The balance of nature is obvious most often when it is disturbed. Yet even here it can seem remarkable how quickly it readjusts itself to a new balance after a disturbance. The science of ecology—the study of the interaction of organisms with their environment—has grown up to deal with the minutiae of the balance of nature. [br] According to the passage,the"biosphere"is the layer on the earth’s surface_____.
选项
A、where the atmosphere meets the sea
B、in which birds, fish and animals would die
C、in which plant and animal life can exist
D、in which earthworms and other invertebrates can live
答案
C
解析
细节题。解题点在第一段。第一句提到“The biosphere is the name biologists give to the sort of skinon the surface of this planet that is inhabitable by living organisms.”可见生物圈指的是living organisms居住的地方,这个C项中的plant and animal life是一个意思,所以正确答案是C选项。其余选项都缩小了living organisms概念的内涵,因而是错误的。
转载请注明原文地址:https://tihaiku.com/zcyy/4041281.html
相关试题推荐
______fromspace,ourearth,withwatercovering70%ofitssurface,appearsas
Thebiosphereisthenamebiologistsgivetothesortofskinonthesurface
EINinoisthetermusedfortheperiodwhenseasurfacetemperaturesareab
Thejobsofwildlifetechniciansandbiologistsseemed______tohim,butoneday
ThegeologyoftheEarth’ssurfaceisdominatedbytheparticularproperties
ThegeologyoftheEarth’ssurfaceisdominatedbytheparticularproperties
ThegeologyoftheEarth’ssurfaceisdominatedbytheparticularproperties
ThegeologyoftheEarth’ssurfaceisdominatedbytheparticularproperties
Thelessthesurfaceofthegroundyieldstotheweightofafully-loadedtruck,
Lithography(平版印刷术)isanartprocessofprintingfromaplanesurfaceonwhic
随机试题
[originaltext]M:Excuseme,doestheexpresstrainleaveat2:05?W:No,at1:5
TheEarthcomprisesthreeprincipallayers:thedense,iron-richcore,them
Somefarmersmayreplantcorn.Othersmay【S1】______cornwithsoybeans(大豆).W
Usingacomputerorsmartphoneatnightcancauseustopileonthepounds,
现代的输血理念包括( )。A.以上都不是 B.以上都是 C.风险规避原则
下图标出了某产品从产地Vs到销地Vt的运输网,剪线上的数字表示这条输线的最大通过
4岁男孩因青紫、气短,经常出现蹲踞现象。诊断为“先心病”。在就诊过程中,突然出现
建设工程勘察、设计文件内容需要作重大修改的,()应当报经原审批机关批准后,
治疗慢性泄搏,宜选用的穴位是 A.内关、足三里、中脘B.天枢、足三里、神阙
城市“现代化”的负面影响之一,就是使得城市不透水地表面积不断增加,严重地削弱了地
最新回复
(
0
)