首页
登录
职称英语
At dusk, a sparrow flies through the dark woods in search of a meal. Spotti
At dusk, a sparrow flies through the dark woods in search of a meal. Spotti
游客
2023-11-13
52
管理
问题
At dusk, a sparrow flies through the dark woods in search of a meal. Spotting a plump hawkmoth clinging to a large tree trunk, the bird lands on a nearby branch. Moving in for the attack, the sparrow suddenly spies a pair of round, menacing eyes. The eyes seem to move up and down like those of an owl. Within a second, the sparrow is all tail feathers as it makes its retreat. But what about the moth?
In order to avoid being eaten, the moth practised a bit of natural "tom foolery" by exposing its secret weapon--eyespots on its wings.
Eyespots are round markings or colorations on animals which look like real eyes. Many in- sects, as well as fish and frogs, use them--in a variety of ways--as a defense against predators.
Eyespots can scare an attacker away--as in the case of the moth above--by making the attacker think it is facing one of its predators. Or they can simply fool predators into thinking they are being watched.
Even when the false eyes don’t stop an attack, they may enable the one who wears them to survive. You see, eyespots are often located "far" from vital organs, on wings, for instance. They lure predators into attacking the "wrong end" of their prey.
The tropical butterfly fish, for example, has an eyespot at the base of its tail. Predatory fish will often try to attack this spot, confusing the dark circle for a real eye--only to find the fish escaping in a completely unexpected direction.
The eyespots on a peacock butterfly’s wings work in a similar way. By luring the predator to the wings instead of the body, the eyespots protect the peacock butterfly’s head from attack. Although the insect may lose a claw or suffer a clipped wing, at least it hasn’t lost its head!
Eyespots work because they take advantage of a weakness in predators, known as "innocence of the eye." Basically, this means that animals believe what they see. Unlike humans, some animals cannot reason beyond what their instincts and past experiences tell them. So, if something looks like an eye to a predator, then it must be an eye--even if it graces the delicate wing of a butterfly. [br] Eyespots may protect an insect from being killed by all of the following means EXCEPT ______.
选项
A、scaring a predator away
B、inviting a predator of the attacker
C、cheating the predator into thinking it is being watched
D、fooling the attacker into attacking its nonvital part
答案
B
解析
第四、五段谈到了动物的眼状色斑可以起到保护作用的原理,由此二段可知应选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3182975.html
相关试题推荐
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopeda
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopeda
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopeda
Thedoctorthinkshe’ll_____now.Histemperaturehasgonedown.A、pullthroughB、
Researchers_____thatgenesmaydeterminethestrengthoftheimmunesystemwhich
Itdidn’tlooklikeAmerica,theexodusofstunnedrefugeeswadingthrought
Itdidn’tlooklikeAmerica,theexodusofstunnedrefugeeswadingthrought
Itdidn’tlooklikeAmerica,theexodusofstunnedrefugeeswadingthrought
Whatdotheresearchersfindaboutmessydesks?[br][originaltext]Managers
Whatshouldthemandofirsttosearchforthebookaccordingtothewoman?[br]
随机试题
What’syour______towardstheadvancedtechnologyinforeigncountries?A、multit
Lastyearatairportsacrosstheworld,18%offlightsweredelayed,leaving
A.DNA结合蛋白 B.细胞周期关卡 C.两者均是 D.两者均非myc基因
状态参数用来描述热力系统状态特性,此热力系统应满足()。A.系统内部处于热平
A.行气豁痰 B.补气回阳醒神 C.平肝潜阳,理气通瘀 D.开窍顺气解郁
A.0 B.1 C.2 D.5
不符合非感染性内膜炎的描述是( )。A.可见于慢性消耗性疾病 B.可见于系统
所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定规律性: A.A
2020年1月1日,甲建筑公司与乙公司签订一项大型设备建造工程合同,根据合同约定
根据《建设工程监理范围和规模标准规定》,下列工程项目中,必须实行监理的是( )。
最新回复
(
0
)