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
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have thei
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have thei
admin
2012-10-23
43
问题
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets?
For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores.it has the ability to suck up mud or sand and digest whatever nutrients are present
Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-colored and nearly white. One form even has vivid purple tentacles. Usually the creatures are cucumber-shaped-hence their name and because they are typically rock inhabitants, this shape, combined with their flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents.
Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become quiescent and live at a low metabolic rate-feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence.
But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs. When attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attacked or even touched: it will do the same if the surrounding water temperature is too high or the water becomes too polluted.
What can be inferred about the defense mechanisms of the sea cucumber?
选项
A、They are very sensitive to the surrounding stimuli.
B、They are almost useless.
C、They require group cooperation.
D、They are similar to those of most sea creatures.
答案
A
解析
文章指出,如果受到攻击,即便是被碰到,海参将会以自己的方式躲避危险。最后一段The seacucumber will eviscerate and regenerate itself if it is attacked or even touched:it will do the same ifthe surrounding water temperature is too high or the water becomes too polluted.
转载请注明原文地址:https://kaotiyun.com/show/FW9O777K
0
考博英语
相关试题推荐
ForthepeoplewhohavenevertraveledacrosstheAtlanticthevoyageisafantasy.Butforthepeoplewhocrossitfrequentlyo
ForthepeoplewhohavenevertraveledacrosstheAtlanticthevoyageisafantasy.Butforthepeoplewhocrossitfrequentlyo
ForthepeoplewhohavenevertraveledacrosstheAtlanticthevoyageisafantasy.Butforthepeoplewhocrossitfrequentlyo
Battlesarelikemarriages.Theyhaveacertainfundamentalexperiencetheyshareincommon;theydifferinfinitely,butstillt
Therearsectionofthebraindoesnotcontractwithage,andonecancontinuelivingwithoutintellectualoremotionalfacultie
Someweeksago,ridinginacabfromBostontoCambridge,mydriverturnedandaskedmewhatIdidforaliving."TeachEnglish,
Someweeksago,ridinginacabfromBostontoCambridge,mydriverturnedandaskedmewhatIdidforaliving."TeachEnglish,
随机试题
吸气性呼吸困难见于下列哪种情况
苏子降气汤中配伍当归和肉桂的意义是()
下列脉象脉位表浅的有
不具备证券自营业务资格的证券公司可将自有资金投资于()。Ⅰ.国债Ⅱ.货币市场基金Ⅲ.投资级公司债Ⅳ.期货
甲部门是一个利润中心。下列各项指标中,考核该部门经理业绩最适合的指标是()。
第三次咨询:2016年3月9日求助者:您好!上一次回去之后,我感觉舒服多了,情绪也好多了。您让我思考的问题,我每晚都在想。我想到了很多很多的事情,我记录下了一些,您看一看符不符合您的要求。心理咨询师:您做得很好,您说情绪有了好的改变,我
目前,我国学校教学的基本组织形式是______。
现代班级管理强调以()为核心来建立管理机制。
岑参在《白雪歌送武判官归京》一诗中,用“________,________。”的诗句,写出了朋友身影已经消失,诗人还在深情目送的情景。
公安工作是()。
最新回复
(
0
)