Which of the following about the African bush elephant and the African elephant is true?A．The WCU are interbreeding those elephants.B．They are interbreeding species.C．They are two genetically distant species.D．They depend on each other for survival.

题目

Which of the following about the African bush elephant and the African elephant is true?

A．The WCU are interbreeding those elephants.

B．They are interbreeding species.

C．They are two genetically distant species.

D．They depend on each other for survival.

相似考题

1.What does the passage tell about the woman？A.Her name is Lucy.B.She was called‘the Elephant Lady’.C.She helped a tiger,a lion and two bears.

2."Hidden" Species May Be Surprisingly CommonCryptic species animals that appear identical but are genetically quite distant—may be much more widespread than previously thought. The findings could have major implications in areas ranging from biodiversity estimates and wildlife management, to our understanding of infectious diseases and evolution.Reports of cryptic species have increased dramatically over the past two decades with the advent of relatively inexpensive DNA sequencing technology. Markus Pfenninger and Klaus Schwenk, of the Goethe-Universitat, in Frankfurt, Germany, analyzed all known data on cryptic animal species and discovered that they are found in equal proportions throughout all major branches of the animal kingdom and occur in equal numbers in all biogeographieal regions.Scientists had previously speculated that cryptic species were predominantly found in insects and reptiles, and were more likely to occur in tropical rather than temperate regions. "Species that are seemingly widespread and abundant could in reality be many different cryptic species that have low populations and are highly endangered. " Says Pfenninger. Until the genetic information of all species in at least one taxon is thoroughly studied, no one will know just how many cryptic species exist. "It could be as high as 30%. " Pfenninger says."I'm extremely surprised by their results. " Says Alex Smith of the University of Guelph in Ontario, Canada. "It's a call to arms to keep doing the broad kind of genetic studies that we are doing. "Sampling as many individuals as possible, scientists hope to complete work on all fish and birds in another 5 to 10 years. Once either of these taxonomic groups is completed, Pfenninger says researchers will be able to decide how many cryptic species exist throughout the animal kingdom.Examples of cryptic species include the African elephant. A 2001 study found the elephants were actually two genetically distinct, non-interbreeding species, the African bush elephant and the African elephant. The species are currently listed as vulnerable and threatened, respectively, by the World Conservation Union (WCU).The reclassifications are more than an academic exercise. They define populations that have evolved independently of each other and whose genetic differences can have significant consequences. In the early 1900s misidentification of mosquito species based on morphology confused attempts to control malaria in Europe. Ultimately, what was thought to be a single species was actually made up of six sibling species, only three of which transmitted the disease. "The basic unit in biology is always the species, and you have to know what you are dealing with. " Pfenninger says. Much previous research is now no longer used, he says, because it is not clear what species was being studied.Which of the following about the significance of the research on cryptic species is NOT true?A．The results of the research can help the development of many other research areas.B．The results of the research can help the development of biodiversity estimates.C．The results of the research can help our understanding of infectious disease evolution.D．The results of the research can help our understanding of "survival of the fittest. "

3.Which of the following statements is true?A. Telephone was invented by a French engineer.B. Roman soldiers sent the important message by spelling out the words.C. African soldiers shouted from tower to tower to pass message.D. Only by using telephone could people send speech sounds quickly.

4.Which of the following is NOT TRUE according to the passage？A.The zoo needed more information about the woman.B.A baby elephant was hurt during the war.C.The woman lived quite near the zoo.

更多“Which of the following about the African bush elephant and the African elephant is true?A．The WCU are interbreeding those elephants.B．They are interbreeding species.C．They are two genetically distant species.D．They depend on each other for survival.”相关问题

  • 第1题：

    (ii) Calculate the minimum target contribution to sales ratio (%) at which ‘Nellie the Elephant’ will be

    financially viable, assuming that all other data remain unchanged. (4 marks)


    正确答案：

     

  • 第2题：

    Which of the following was true of the local African slavery?

    [ A] Slaves might have their own families.

    [ B] The son of a slave might not be a slave.

    [ C] Slavery was confmed to the coastal regions.

    [D] There was no killing in African slavery.


    正确答案：B
    47．B 【精析】该题为细节题。文中并未提到选项A表述的内容；根据第一段第五句“They had clearly defined rights，and their slave sta- tus was not necessarily inherited.”我们知道，非洲当地的奴隶拥有明确的权利，而且他们的奴隶身份不一定是世袭的，因此，我们可以判断出，奴隶的下一代不一定还是奴隶，B项正确；第一段第一句“For centuries the most valuable of African resources for Europeans were the salves, but these could be obtained at coastal ports．without any need for going deep inland．”告诉我们，运往欧洲的奴隶来自于海港地区，并没有指出非洲本地的奴隶制度只限于海港地区，故C项的表述是错误的；根据第一段倒数第三句 “Slavery in its extreme forms, including the taking of life, was common to both Africa and the West.”我们知道，屠杀奴隶的事件在非洲和西方国家都有发生，故D项的表述是错误的。

  • 第3题：

    Pocahontas talks about the conflict between African tribes and English colonists.()


    参考答案：错误

  • 第4题：

    You issued the following commands to configure setting in RMAN;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）

    A. The backup will terminate because the FORMAT clause was not configured for the channel

    B. It backs up two copies of data files to tape and disk, and two copies of archived log file on tape

    C. It backs up the data files and archived log files to disk, making two copies of each data file and archived log file

    D. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file


    参考答案：D

  • 第5题：

    This may have preserved the elephant from extinction as well as other animals () in Africa.

    A、hunted

    B、hunting

    C、that hunted

    D、are hunted


    参考答案：A

  • 第6题：

    Which of the following is required if ports from VLANs on two separate switches need to broadcastto each other?()

    A. Port mirroring

    B. VPN

    C. Trunking

    D. Port authentication


    参考答案：C

  • 第7题：

    29． Which of the following is TRUE according to the passage?

    A．Parents quarrel because they don't love each other．

    B．lf your parents often quarrel．don't leave them alone．

    C． No one wants a family with quarreling or fighting．

    D． When parents are angry．they think much about children．


    正确答案：C
    C【解析】C项与文章最后一段第一句意思相同，故选C。

  • 第8题：

    Why did the African nations welcome an ivory ban?___________

    A.The rate of killing has been accelerating
    B.The US government forbids imports of both raw and finished ivory
    C.They realized that the killing of elephants is a serious threat to their tourist business
    D.African people advocated an ivory ban

    答案：C
    解析：
    本题为细节考查题。由第三段“…but increasingly they realized that the decimation ofthe elephant herds poses a serious threat to their tourist business．"可知．答案C正确。

  • 第9题：

    Which of the following is true about an OSPF area border router (ABR)?（）

    • A、The ABR must have multiple interfaces connected to the backbone areA
    • B、An ABR is a router with two interfaces, each connected to a different nonbackbone areA
    • C、The only requirement to be considered an  ABR is at least one interface connected to the backbone areA
    • D、An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA

    正确答案:D

  • 第10题：

    Which two statements are true about the forwarding table?（）

    • A、The forwarding table lists each source protocol and preference for each destination
    • B、The forwarding table constains only active routes
    • C、The forwarding table is used to process transit packets
    • D、The forwarding table is stored in compact flash

    正确答案:B,C

  • 第11题：

    单选题
    Which one of the following aspects of Hughes’s poetry does the author appear to value most highly?
    A

    its novelty compared to other works of African American literature

    B

    its subtle understatement compared to that of other kinds of folk literature

    C

    its virtuosity in adapting musical forms to language

    D

    its expression of the folk culture of Black People


    正确答案： A
    解析：
    从第二段“Hughes’s expression of the vibrant folk culture of Black people established his writing as a landmark in the history of African American literature.”可知作者认为休斯对黑人民间文化的表达具有标志性的重要意义，故答案为D。

  • 第12题：

    单选题
    You issued the following commands to configure setting in RMAN; Then you issued the following command to take the backup: RMAN> BACKUP DATABASE PLUS ARCHIVELOG; Which statement is true about the execution of the above command?（）
    A

    The backup will terminate because the FORMAT clause was not configured for the channel

    B

    It backs up two copies of data files to tape and disk, and two copies of archived log file on tape

    C

    It backs up the data files and archived log files to disk, making two copies of each data file and archived log file

    D

    It backs up the data files and archived log files to tape, making two copies of each data file and archived log file


    正确答案： D
    解析： 暂无解析

  • 第13题：

    Which of the following is NOT TRUE in the passage?

    A. The two-way radio is like a telephone for Australian farmers.

    B. Families on large farms could keep in touch with each other by radios.

    C. The two-way radio is like a newspaper for Australian farmers.

    D. All the Australians live on dry places, and they use radios in many ways.


    正确答案：D

    此题为三正一误的细节题。不符合事实的是D。

  • 第14题：

    The difference between an African elephant and an Asian one is that the former has______ .

    A.larger

    B.the large

    C.more larger

    D.the largest


    正确答案：A

  • 第15题：

    The combination of the promotional tools is called___.

    A.the promotion mix

    B.the double-edge sword

    C.the marketing mix

    D.the white elephant


    正确答案：A

  • 第16题：

    Which of the following is NOT true about the centrifugal separator?

    A.It can be applied to separate two liquids

    B.It cannot separate solids which contaminated in the oil.

    C.It consists of purifier and clarifier

    D.The centrifuge arranged to separate two liquids is known as purifier


    答案：B

  • 第17题：

    Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?

    A.The mixture is too lean to burn

    B.The mixture is too rich to burn

    C.The vapor is about to explode

    D.Conditions are perfect for combustion


    正确答案：B

  • 第18题：

    Which of the following is true about an OSPF area border router (ABR)?()

    A. The ABR must have multiple interfaces connected to the backbone areA

    B. An ABR is a router with two interfaces, each connected to a different nonbackbone areA

    C. The only requirement to be considered an ABR is at least one interface connected to the backbone areA

    D. An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA


    参考答案：D

  • 第19题：

    Which statement about the dangerous cargo manifest，carried on a ship，is TRUE ________．

    A.The manifest must be made up by the Master or other designated ship's officer

    B.Shipments of hazardous and non-hazardous cargo may be listed on the manifest if they are destined for the same consignee

    C.The manifest must be kept in a designated holder on or near the bridge

    D.The type of label（s）required for each cargo must be indicated


    正确答案：C

  • 第20题：

    What is the relationship between the estimate and the plan?__________.

    A.The plan depends on the estimate
    B.The estimate depends on the plan
    C.The plan has nothing to do with the estimate
    D.The estimate and the plan depend on each other

    答案：D
    解析：
    本题考查的仍是对短文个别段落和中心意思的理解能力。短文第三段集中讲的就是和建房方案之间的关系。A项只说出了建房方案对预算的依赖关系；B项只说出预算对建房方案的依赖关系，而忽略它们相互作用的一面，因此都是片面的。而C项说的是建房方案与预算毫不相干，这与短文交代的事实背道而驰，故予以排除。

  • 第21题：

    Which of the following is required if ports from VLANs on two separate switches need to broadcastto each other?（）

    • A、Port mirroring
    • B、VPN
    • C、Trunking
    • D、Port authentication

    正确答案:C

  • 第22题：

    单选题
    Which of the following is TRUE?
    A

    Maggie loved to help other African Americans.

    B

    Maggie was very popular with school teachers.

    C

    Maggie was the founder of the Order of St. Luke.

    D

    Maggie was better paid than men as Grand Secretary Treasurer.


    正确答案： D
    解析：
    根据文章第二段最后两句“Maggie Walker loved the work of the organization. The organization believed that African Americans should take care of each other”可知，Maggie热爱这个组织的工作。该组织认为，非洲裔美国人应该互相照顾。正确答案为A。

  • 第23题：

    单选题
    Which of the following is TRUE?
    A

    Maggie loved to help other African Americans.

    B

    Maggie was very popular with schoolteachers.

    C

    Maggie was the founder of the Order of St. Luke.

    D

    Maggie was better paid than m.en as Grand Secretary Treasurer.


    正确答案： C
    解析：

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