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
69
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:http://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
Someofthemostimportantconceptsinphysics______theirsuccesstothesemath
[originaltext]BynowyoumayhaveheardTaylorSwift’sheartbreakingsong"
Abalanceddietprovidesanadequateintakeofnutrientsformaintenanceof
商业银行中,董事会与股东大会应负责制订业务应急性计划和连续性计划。
护患关系应为( )A.教育与被教育关系 B.领导与被领导关系 C.指导与服
当有学生中暑时,下列选项中做法错误的是()A.将病人搬到阴凉通风处 B.
某市中心区西部有一工厂,位于该市主干道左侧,用地8hm2。随着城市建设的发展,该
在原核生物转录过程中,RNA聚合酶的哪个亚基脱落下来?
下列选项中,不符合底和墙砌筑技术要求的是()。A.砌筑炉底前,应预先找平基
关于活体器官采集,不正确的是A.捐献者应在无压力情况下表明自己的捐献意愿 B.
最新回复
(
0
)