首页
登录
职称英语
Certainly no creature in the sea is odder than the common sea cucumber. All
Certainly no creature in the sea is odder than the common sea cucumber. All
游客
2025-04-05
35
管理
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. [br] 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
题目问:关于海参的防御机制可以推断出什么?最后一段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.通过这句话可知,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。据此判断,应选择A。
转载请注明原文地址:https://tihaiku.com/zcyy/4027298.html
相关试题推荐
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Awonderdrugwas______fromthiscommonherbasacuretorcancer.(2007年中国矿业大学考
Whiteisthe______colorofaweddinggown.A、normalB、ordinaryC、commonD、conven
Withitsownparliamentandcurrencyandacommon______forpeace,theEuropean
Thetiesthatbindustogetherincommonactivityareso______thattheycandi
Therepublicationofthepoet’smostrecentworkswillcertainly______hisnatio
Alllivingcreatureshavetoconstantly______variouschangesintheirenvironmen
IwasluckybecauseIhadturnedmybackon______,pursuinginsteadcommon-sense
Lessthan40yearsagointheUnitedStates,itwascommontochangeaone-d
Lessthan40yearsagointheUnitedStates,itwascommontochangeaone-d
随机试题
(浙江大学2008年试题)Theenergycrisis,whichisbeingfeltaroundtheworld,hasd
Imaginegoingtoyourdoctorwithacomplaintoffrequentheadaches.Yourdo
A.mentallyB.standC.assistD.complexE.s
有一位银行家被他的决心和乐观精神所打动,最终答应贷款给他,供其开业。Impressedbyhisdeterminationandoptimism,
【S1】[br]【S5】H上文告诉我们,在就业比较容易的年代,求职者求职时只需要写清楚name,address,ageandwhetheryouha
钢绞线计算面积比相同数量钢丝面积之和()。A、较大 B、较小 C、相等
下列气性坏疽的临床表现中,错误的是A.伤后1~4天发病,但也有6小时以内发病者
土家族被列入国家级非物质文化遗产名录的项目有()A.“八宝铜铃舞” B.“茅古
中西方学者一直主张把()作为划分货币层次的主要依据。A.流动性 B.风险性
某重力式码头基础长200m,分两段施工,基槽开挖要求风化岩层以上的黏土及淤泥层要
最新回复
(
0
)