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
75
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
Youtwohavegotalot______.A、ingeneralB、incommonC、inallD、inanycaseB本题
Hisfriends______himofhavingbrokerhiswords.A、denouncedB、complainedC、accus
StudentexpeditionsdoagreatdealofgoodworkontheArcticislandsbutf
烧伤后代谢性酸中毒的原因有()A.能量代谢亢进 B.组织低灌注 C.肾功
转授权是指商业银行总部对总部相关授信业务职能部门或直接管理的经营单位授予全部或部
患者,女性,53岁。多饮、多食、多尿伴消瘦半年。实验室检查:空腹血糖增高,尿糖阳
患者,男,12岁。间断咳嗽6个月,左膝痛2个月,偶发热,最高体温T38.0℃。
某公司的员工中,拥有本科毕业证、计算机登记证、汽车驾驶证的分别有130人、110
一种商品的价值通过与它相交换的一系列商品表现出来,这种价值形式是()。A.
某施工企业刚建立时,资产总额为8000万元,现发生一笔以银行存款100万元偿还银
最新回复
(
0
)