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
2025-03-28
18
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/4016790.html
相关试题推荐
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Whatdotheextraordinarilysuccessfulcompanieshaveincommon?Tofindout
Whatdotheextraordinarilysuccessfulcompanieshaveincommon?Tofindout
Whatdotheextraordinarilysuccessfulcompanieshaveincommon?Tofindout
Withitscommoninterestinlawbreakingbutitsimmenserangeofsubject-mat
Withitscommoninterestinlawbreakingbutitsimmenserangeofsubject-mat
Withitscommoninterestinlawbreakingbutitsimmenserangeofsubject-mat
Onlyahandfulofcreaturesonearthcarrythedreadtitle"man-eater".The
Onlyahandfulofcreaturesonearthcarrythedreadtitle"man-eater".The
随机试题
•Youwillheartheorganiserofanannualconferenceattendedbythesalesrepr
Emilystartedworkingforthecompany[br]Emilywouldlikethecompanytobuy[
Asadevelopingcountry,wemustkeep_____withtherapiddevelopmentoftheworld
函数f(χ)的定义域为全体实数,且是以5为周期的奇函数()A.1 B.-1
患儿,6个月,夜间哭闹,多汗烦躁,发稀。此时应首先添加的辅食是A.鱼泥 B.蛋
3~6个月佝偻病患儿可见的体征是A、方颅 B、郝氏沟 C、肋骨串珠 D、O
用长16厘米的铁丝围成各种长方形(长、宽均为整数,且长和宽不相等),围成的最大的
下列各项中,导致银行存款日记账余额大于银行对账单余额的未达账项是( )。A.银
建设工程勘察合同管理中,勘察人更换项目负责人应事先得到发包人同意,并应在更换(
男性,22岁。大学生,有礼貌,帮助他人,尊师爱校。这位男同学的行为方式A、理智特
最新回复
(
0
)