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
For most species of animals, the number of individuals in the species is inversely proportional to the average body size for mem
For most species of animals, the number of individuals in the species is inversely proportional to the average body size for mem
admin
2019-11-17
44
问题
For most species of animals, the number of individuals in the species is inversely proportional to the average body size for members of the species: the smaller the body size, the larger the number of individual animals. The tamarin, a small South American monkey, breaks this rule. Of the ten primate species studied in Peru’s Manu National Park, for example, the two species of tamarins, saddle-backed and emperor, are the eighth and ninth least abundant, respectively. Only the pygmy marmoset, which is even smaller, is less abundant. The tamarin’s scarcity is not easily explained; it cannot be dismissed as a consequence of diet, because tamarins feed on the same mixture of fruit, nectar, and small prey as do several of their more numerous larger counterparts, including the two capuchins known as the squirrel monkey and the night monkey. Although the relative proportions of fruits consumed varies somewhat among species, it is hard to imagine that such subtle differences are crucial to understanding the relative rarity of tamarins.
To emphasize just how anomalously rare tamarins are, we can compare them to the other omnivorous primates in the community. In terms of numbers of individuals per square kilometer, they rank well below the two capuchins, the squirrel monkey and the night monkey. And in terms of biomass, or the total weight of the individuals that occupy a unit area of habitat, each tamarin species is present at only one-twentieth the mass of brown capuchins or one-tenth that of squirrel monkeys. To gain another perspective, consider the spatial requirements of tamarins. Tamarins are rigidly territorial, vigorously expelling any intruders that may stray within the sharply defined boundaries of their domains. Groups invest an appreciable part of their time and energy in patrolling their territorial boundaries, announcing their presence to their neighbors with shrill, sweeping cries. Such concerted territoriality is rather exceptional among primates, though the gibbons and siamangs of Asia show it, as do a few other New World species such as the titi and night monkeys. What is most surprising about tamarin territories is their size.
Titi monkeys routinely live within territories of 6 to 8 hectares, and night monkeys seldom defend more than 10 hectares, but tamarin groups routinely occupy areas of 30 to 120 hectares. Contrast this with the 1 to 2 hectares needed by the common North American gray squirrel, a nonterritorial mammal of about the same size. A group of tamarins uses about as much space as a troop of brown capuchins, though the latter weighs 15 times as much. Thus, in addition to being rare, tamarins require an amount of space that seems completely out of proportion to their size.
The author regards the differences between the diets of the tamarins and several larger species as
选项
A、generally explicable in terms of territory size
B、apparently too small to explain the rarity of tamarins
C、wholly predictable on the basis of differences in body size
D、a result of the rigid territoriality of tamarins
E、a significant factor in determining behavioral differences
答案
B
解析
Supporting Idea
This question depends on recognizing that the passage rejects the idea that any differences between the diets of tamarins and those of certain larger animals are large enough to explain tamarins’ relative rarity. The passage points out that these animals feed on the same fruits, nectar, and small prey, and claims that though the proportions of the fruits consumed varies somewhat, this variation is not sufficient to explain the tamarins rarity.
A The author does not seek to explain why these differences in diet—which the passage indicates are minimal—exist. Given that the author indicates that differences in territory size are large and differences in diet are small, it is unlikely, in any case, that the author would regard the former as explaining the latter.
B Correct. The passage indicates that the differences in diet among these animals are too small to explain the rarity of tamarins.
C The author does not give any indication that the differences in the diets of these animals are predictable based on differences in body size.
D The author does indicate that tamarins are rather unusual among primates in their rigid territoriality, but there is no indication that this rigid territoriality explains the small differences in diet among tamarins and certain larger animals.
E The author mentions differences in diet merely to rule out that these differences are large enough to explain tamarins’ rarity; these differences are not mentioned as a factor in determining behavioral differences.
The correct answer is B.
转载请注明原文地址:https://kaotiyun.com/show/fQkO777K
本试题收录于:
GMAT VERBAL题库GMAT分类
0
GMAT VERBAL
GMAT
相关试题推荐
Atfirsttheinstituterefusedtopurchasethetelescope,butthisdecisionwas_________revised.
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseitisinherited,therearealsoregionsoftheDNAstr
Byeducation,Imeantheinfluenceoftheenvironmentupontheindividualtoproduceapermanentchangeinthehabitsofbehavio
______English,sheisstudyingJapaneseandFrench.
Normallyastudentmustattendanumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimagradewhic
Normallyastudentmustattendanumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimagradewhic
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
Generallyspeaking,employersarelookingfortwothingsinjobapplicants:proofthatacandidatecanhandleaspecificjoband
随机试题
21-三体综合征绝大部分核型是
A.颊部蝶形红斑B.向阳性皮疹C.结节红斑D.网状青斑E.紫癜样皮疹常见于白塞病的皮肤损害是
女,32岁,经产妇,平时月经周期规律,经量中等,普查发现子宫肌瘤。来院咨询子宫肌瘤的治疗方法,医师回答中下列哪项错误
A、α受体阻断药B、β受体阻断药C、α,β受体阻断药D、α1受体阻断药E、β1受体阻断药酚妥拉明属于
三级概算的编制形式的组成内容不包括()。
根据下面材料,回答问题。2014年,我国价格水平涨幅较低。全年居民消费价格比上年上涨2.0%,其中食品价格上涨3.1%:固定资产投资价格上涨0.5%;工业生产者出厂价格下降1.9%;工业生产者购进价格下降2.25%:农产品生产者价格下降0.2%。
对“人无远虑,必有近忧”你怎么看?
应用数据库的主要目的是( )。
请根据提供的素材文件“ppt素材.docx”中的文字、图片设计制作演示文稿,并以文件名“ppt.pptx”存盘,具体要求如下:第1张幻灯片作为标题页,标题为“云计算简介”,并将其设为艺术字,有制作日期(格式:××××年××月××日),并指明制作者为“考
Whatisoneservicethatbanksdonotprovide?
最新回复
(
0
)