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
考研
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some group
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some group
admin
2017-02-17
50
问题
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some groups of mammals have become very large, such as elephants and whales,【C1】______others have always been small, like primates. A new theory developed by an international team, led by Jordan Okie,【C2】______an explanation for why and how【C3】______groups of organisms are able to evolve【C4】______sizes, whereas others are not.
The research team【C5】______information on how quickly an individual animal grows and used it to【C6】______how large it may get【C7】______evolutionary time. Their research was published recently.
The new theory developed from the observation that some animals【C8】______fast and die young, while others take their time and mature much later. "Fast" animals-such as mice—breed very quickly, while humans mature slowly and are relatively older when they first have children. The theory【C9】______that those species that are relatively faster are more likely to evolve a large size quicker than slow species, and that their maximum size will be greater.
The research team tested their theory using the【C10】______records of mammals over the last 70 million years, examining the maximum size of each mammal group【C11】______that time, including whales, elephants, seals and primates. They found that their theory was very well【C12】______.
"Primates have evolved very slowly, and never got bigger than 1,000 pounds," said Okie, "The【C13】______was true of whales, which evolved their large size at the fastest【C14】______recorded."
The theory also makes predictions about the relative risks of extinction for large animals【C15】______small. The maximum size of an animal is limited by the rate of mortality in the【C16】______. Because larger animals【C17】______breed less frequently than smaller animals,【C18】______the mortality rate doubles, the maximum size is predicted to be 16 times smaller.
"This is a really surprising【C19】______," said Okie. "It points to another reason why many of the large animals went【C20】______after the last Ice Age, and their high risk of extinction in modern environments."
【C16】
选项
A、quality
B、team
C、amount
D、population
答案
D
解析
空格前提到动物的最大体型受限于其死亡率(the rate of mortality)。死亡率是基于死亡的动物数目与其全体数量相比得出的数据,因此空格处所填之词应能指代该动物整体,故D项population“种群”为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/ptEZ777K
0
考研英语一
相关试题推荐
WhatdoRussia’sBelgorodprovinceandsomeschoolsinFloridaandConnecticuthaveincommon?Theyareunlikelyrecruitstothe
WhatdoRussia’sBelgorodprovinceandsomeschoolsinFloridaandConnecticuthaveincommon?Theyareunlikelyrecruitstothe
WhatdoRussia’sBelgorodprovinceandsomeschoolsinFloridaandConnecticuthaveincommon?Theyareunlikelyrecruitstothe
WhatdoRussia’sBelgorodprovinceandsomeschoolsinFloridaandConnecticuthaveincommon?Theyareunlikelyrecruitstothe
WhatdoRussia’sBelgorodprovinceandsomeschoolsinFloridaandConnecticuthaveincommon?Theyareunlikelyrecruitstothe
ForyearsAmericanconversationaboutIraqhasincludedarefrainabouthowwecannotexpecttocreateaJeffersoniandemocracy
IfAmericanmedicinewereapatient,hewouldweigh350poundsandbegainingfast.Despitebeingrepeatedlycounseledaboutthe
IfAmericanmedicinewereapatient,hewouldweigh350poundsandbegainingfast.Despitebeingrepeatedlycounseledaboutthe
Nearlythree-quarteroftheEarthiscoveredwithwater.The【B1】______ofthecontinents,especiallyinthetemperatezones,isv
随机试题
(2011年10月)1935年,日本帝国主义制造了侵略中国的________。
InEngland,peopleoftentalkabouttheweatherbecausetheycanexperiencefourseasonsinoneday.Inthemorningtheweather
关于基地高程的确定,下列哪种说法是不妥的?[2001-50]
建设工程定额是工程建设中各类定额的总称,按照投资的费用性质,可将建设工程定额分为建筑工程定额、设备安装工程定额、建筑安装工程费用定额、工器具定额以及工程建设其他费用定额等。工程建设定额中,分项最细、定额子目最多的定额是()。
国务院部门规章与地方性法规之间对同一事项的规定不一致,不能确定如何适用时,由()提出意见。
2009年6月,某电视剧制作中心编剧张先生从该中心取得工资3000元、第二季度的奖金1500元及剧本使用费10000元。张先生6月份应缴纳个人所得税()元。
市场定位方式有()。
以下关于项目收尾的概念,理解不正确的一项是________。
“诗不可译”的说法广为流传。但是,诗歌的创作与研究,需要仰仗不同语种诗歌的交流与碰撞。所以,总有一些人“_______”,默默地从事着诗歌翻译的探索工作。填入画横线部分最恰当的一项是:
绿茶:音乐
最新回复
(
0
)