首页
登录
职称英语
[originaltext] Through a series of experiments an American scientist has obt
[originaltext] Through a series of experiments an American scientist has obt
游客
2023-09-12
26
管理
问题
Through a series of experiments an American scientist has obtained an understanding of the social structure of the most complex of ant societies. The ants examined are the only creatures other than man to have given up hunting and collecting for a completely agricultural way of life. In their underground nests they cultivate gardens on soil made from finely chopped leaves. This is a complex operation requiring considerable division of labor. The workers of this type of ants can be divided into four groups according to size. Each of the groups performs a particular set of jobs.
The making and care of the gardens and the nursing of the young ants are done by the smallest workers. Slightly larger workers are responsible for chopping up leaves to make them suitable for use in the gardens and for cleaning the nest. A third group of still larger ants do the construction work and collect fresh leaves from outside the nest. The largest are the soldier ants, responsible for defending the nest.
To find out how good the various size-groups are at different tasks, the scientist measured the amount of work done by the ants against the amount of energy they used. He examined first the gathering and carrying of leaves. He selected one of the size groups, and then measured how efficiently these ants could find leaves and run back to the nest. Then he repeated the experiment for each of the other size-groups. In this way he could see whether any group could do the job more efficiently than the group normally undertaking it.
The intermediate-sized ants that normally perform this task proved to be the most efficient for their energy costs, but when the scientist examined the whole set of jobs performed by each group of ants it appeared that some sizes of worker ants were not ideally suited to the particular jobs they performed.
选项
A、They run about and hunt for food.
B、They collect but do not produce their own food.
C、They do not rely on clear division of labor.
D、They lead a completely agricultural way of life.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3008476.html
相关试题推荐
[originaltext]Massmediaaretoolsofcommunication.Massmediaallowusto
[originaltext]Massmediaaretoolsofcommunication.Massmediaallowusto
[originaltext]Ourfriend,Nick,whoseEnglishgetsbetterandbetter,decla
[originaltext]M:Manypeopleseemtobeonadiet.Haveyounoticedthat,Anna?
[originaltext]M:Manypeopleseemtobeonadiet.Haveyounoticedthat,Anna?
[originaltext]W:I’vegottomakeaphonecall.Thereisaphone-boxoverthere
[originaltext]W:I’vegottomakeaphonecall.Thereisaphone-boxoverthere
TheAmericaneducationsystemrequiresthatstudentscomplete12yearsofpr
TheAmericaneducationsystemrequiresthatstudentscomplete12yearsofpr
TheAmericaneducationsystemrequiresthatstudentscomplete12yearsofpr
随机试题
Shegavehimbackthemoneyshe’dstolenfor______sake.A、consentB、conscience’
TheNewBusinessModelsA)Mostemergingcountriesarefo
Nowweareengagedinagreatcivilwar,testingwhetherthatnation,orany
Whatisthepurposeofthespeaker?Togivesomeadviceonhowto______abooksto
针对《用一根线散步——室内线描写生》一课,不合适的教学方法是( )。A.让学生
某商场2011年5月1日针织品库存146000,本月购进850000元,本月销售
已知某污水20°C时的BOD5为200mg/L,此时的耗氧速率关系式为lgL1/
某工程项目质量保修期内发现存在因施工原因造成的质量缺陷,监理单位出具了鉴定结论,
B企业为扩大产能,投资1.5亿元,新建建筑面积为12000m2的厂房,新建厂房为
下列关于噪声污染防治的说法中,错误的是()。A.在医院、学校等附近,禁止夜间进行
最新回复
(
0
)