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
You will read a short passage, listen to a talk, and answer a question about them. After you hear the question, you will have 30
You will read a short passage, listen to a talk, and answer a question about them. After you hear the question, you will have 30
admin
2022-04-28
13
问题
You will read a short passage, listen to a talk, and answer a question about them. After you hear the question, you will have 30 seconds to prepare a response and 60 seconds to record the response.
Now read the passage about the strategy brood parasitism. You will have 45 seconds to read the passage. Begin reading now.
Brood Parasitism
Brood parasitism is a strategy used by brood parasites where organisms manipulate and use host individuals either of the same or different species to raise the young of the brood parasite. This relieves the parasitic parents from the investment of rearing their young or building nests, enabling them to spend more time foraging, producing offspring, etc. Brood parasitism has been observed among birds, insects, and fish. This parasitic relationship is typically to the detriment of the host species as eggs and brood compete for incubation, nourishment, and protection.
Now listen to part of a lecture on this topic in a biology class.
How does the example given by the professor help illustrate the phenomenon of brood parasitism? Use specific details in your answer.
Now listen to part of a lecture on this topic in a biology class.
Brood parasitism is a very interesting and peculiar evolutionary phenomenon whereby a parasite organism leaves its offspring to be incubated and cared for by a host organism. The parasite organism typically accomplishes this by manipulating or tricking the host into believing that parasite brood is in fact host brood. The host organism will then care for this parasite brood, which is usually to the detriment of the host brood as both broods compete for nourishment and survival.
Brood parasitism behavior has been widely observed among birds, fish, and insects. Let me give you an example so you can better understand this phenomenon. Fish A is the host organism while Fish B is the parasitic organism. Fish A lays eggs in the water and after fertilization the eggs are stored safely in the mouth of Fish A during the incubation period. Storing the eggs inside of the mouth provides a safe environment for the eggs to incubate as the chance of predation is greatly diminished. Fish B, the parasitic organism, also lays and fertilizes their eggs and hides them amongst the eggs of Fish A. Fish A unknowingly takes both broods into its mouth and incubates them. This has relieved Fish B parents from any responsibility of incubating, protecting or nourishing their young because Fish A has been successfully tricked into caring for both broods. Fish B has more time to spend looking for food and producing more offspring while Fish A is stuck with the burden of looking after the offspring.
选项
答案
When they become parents, the brood parasites will manage to pass off their babies as those of others and use other parents to raise their offspring. This strategy relieves the brood parasites from the burden of nourishing the young, but it’s at the expense of the host brood as both broods will compete for resources and survival. For example, let’s say Fish A is the host organism while Fish B is the brood parasite. After Fish A lays and fertilizes its eggs, it’ll store them in its mouth for incubation. Fish B then tries to hide its own eggs amongst those of Fish A and has the host rear its babies. In this way, Fish B has more time to search for food or produce more eggs while Fish A is burdened with the incubation and protection of the eggs.
解析
转载请注明原文地址:https://kaotiyun.com/show/ZpfO777K
0
托福(TOEFL)
相关试题推荐
Completethenotesbelow.WriteONEWORDONLYforeachanswer.ChimpanzeebehavioursSpeciesWecanfindPanorPanTroglodytes
Choosethecorrectletter,A,B,orC.Whathasbeenoneresponsetothisproblem?
ChoosethecorrectletterA,BorC.Marycriticisesmultiple-choicequestions,because
Completetheflowchartbelow.WriteNOMORETHANTWOWORDSforeachanswer.Expertiseincreativewriting
economic本题有关斯里兰卡的卫生项目给当地居民带来的好处。录音原文中的improve是题目中providebetter的同义替换:而chances是opportunities的同义转述。
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalsthatarealready【31】________,wecandosomething
adjustable录音原文中提到有六个搁板,其中两个是固定的(fixed),另外四个则是可调节的(adjustable)。
metalandleather空格前为madeof,推测应当填入表示材质的名词。录音原文中的wereproduced是题目theproductionof的同义替换。故空格处填入metalandleather。
Whatdoesthepassagemainlydiscuss?Accordingtothepassage,agriculturalsocietiesproducedlargerhumanpopulationsbecau
A、Hewantstoliveoffcampus.B、Thereareadvantagesanddisadvantagestolivingoffcampus.C、Livingspaceinthedormiscrow
随机试题
忠儿,女,11个月。便秘2个多月。腹胀,无呕吐,钡剂灌肠示直肠上方有局限性狭窄,狭窄近端结肠扩张明显。最可能的诊断为
支气管粘膜包括下列哪些细胞
某服装厂从去年7月开张,前两个月生意不错,资金周转顺利。按时向税务机关进行了纳税申报。10月,因一些衣服积压,加上有的客户资金没有及时返回,资金周转出现了困难。没有及时进行纳税申报。县国税局催缴两次,该服装厂都没有理会。县国税局经税务局局长批准后,派税务人
下列各项中,属于材料采购成本的有()。
圣纪节是纪念穆罕默德诞生和逝世的节日。据传穆罕默德诞生和逝世都是教历3月12日,故又称圣忌、圣祭或圣会。()
注意事项1.本题本由给定资料与申论要求两部分构成。考试时限为120分钟。其中,阅读给定资料参考时限为40分钟,作答参考时限为80分钟。满分100分。2.监考人员宣布考试开始时。你才可以开始答题。3.请在答题卡指定位置填写自己的
材料1“法律必须被信仰,否则它将形同虚设”——伯尔曼“法律应在任何方面受到尊重而保持无上的权威……”——亚里士多德“法律不是压制自由的措施,正如重力定律不是阻碍阻止运动的措施一样。”——马克思材料2党的十八届三中全会提出,法律的生命力在于实施,法
运行以下程序后,输出的图形是PrivateSubCommand1_Click()Line(500,500)-(1000,500)Line(750,300)-(750,700)
--Wouldyoulikeabottleofmineralwater?--______.
A、Computers.B、Mobilephones.C、Farmingtechnology.D、A,BandCD细节题:选项A、B和C在对话中都出现过,但题目要求找出Hannah对“technology”一词的理解。对话中有这样一段话:
最新回复
(
0
)