首页
登录
职称英语
Elephants don’t forget—at least, female elephants don’t. Elephant families a
Elephants don’t forget—at least, female elephants don’t. Elephant families a
游客
2024-01-18
42
管理
问题
Elephants don’t forget—at least, female elephants don’t. Elephant families are matriarchal. And the social knowledge gained by the oldest females is the key to a family group’s survival, according to a study published in April by Karen McComb, a biologist at Sussex University in England.
Elephants announce their presence by making a deep, long sound, a practice referred to as contact calling(联络呼叫). An unfamiliar call may mean that an elephant from outside the family group is nearby. A stranger can cause trouble, interrupting feeding or disturbing the young. So an elephant
matriarch
signals the family to gather around her; then they all lift their trunks in the air to smell the unfamiliar caller. False alarms can disturb the group and take time and energy away from feeding, so survival may depend in part on getting it right.
Working with Cynthia Moss, who founded the Amboseli Elephant Research Project in Kenya 30 years ago, McComb tested the social knowledge of 21 Amboseli elephant families with matriarchs 27 to 67 years old. She played recordings of contact calls to each family and found that the oldest matriarchs were much better at picking out unfamiliar calls. In fact, a group with a matriarch in her fifties was several thousand times more likely to form into a group upon hearing an unfamiliar contact call than when hearing a familiar call. However, families with younger matriarchs were less than twice as likely to gather together upon hearing an unfamiliar contact call as compared with a familiar call. And they gathered together a lot. Moreover, the social knowledge of older matriarchs translated into favourable results: Families with older matriarchs produced more baby elephants in each female-reproductive year.
This finding shows how difficult it is to protect the oldest members of elephant families. As elephants age, they continue to grow larger, as do their much wanted tusks(象牙). So the older and wiser a matriarch is, the greater the chance she will be killed. About 800,000 elephants have been killed by people in the past 20 years. [br] What does the underlined word "matriarch" mean?
选项
A、An old member of an elephant family.
B、A female head of an elephant family.
C、A wise elephant.
D、A large elephant.
答案
B
解析
由第一段“Elephants don’t forget—at least,female elephants don’t.Elephantfamilies are matriarchal.”和画线词句“an elephant matriarch signals the faro—ily to gather around her”可推断出正确答案为B。
转载请注明原文地址:http://tihaiku.com/zcyy/3373906.html
相关试题推荐
Don’tforget______thewindowbeforeleavingtheroom.A、tohaveclosedB、toclose
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
Timwillnot(lent)youthebook(because)heisfearful(if)youwillforgetto
Somepoorfamiliescannotaffordthetuition______oftheirchildren.A、feesB、pa
你别忘记列出一张学生必读的书单。Don’tforgettomakeareadinglistforthestudents.
Theday______Ishallneverforgetistheone______Ijoinedthearmy.A、that...whe
据说有些单亲家庭的孩子生活很悲惨。Itissaidthatinsomesingle-parentfamilieschildrenlivea
Don’tforgettowritetome,______?A、doyouB、areyouC、won’tyouD、willyouD祈使
随机试题
NarratorListentopartofalectureinabusinessclass.Nowgetreadytoanswe
ThesmalleststateoftheUnitedStatesisA、RhodeIsland.B、Maine.C、Texas.D、Al
ThefollowingplaysarecomediesbyShakespeareEXCEPTA、AMidsummerNight’sDrea
Ice-cream’soriginsareknowntoreachbackasfarasAlexandertheGreat,a
Althoughtherearebodylanguagesthatcancrossculturalboundaries,cultur
Arhetoricianwhospendssomuchofhistimestudyingthefamous______oflogici
预应力混凝土桥梁用锚具、夹具疲劳荷载试验应力幅值应不小于()。A、50MPa
阅读材料,根据要求完成教学设计。 信息技术实验课是学生亲身实践与操作,习得、强
(2019年真题)关于普通股股东的表决权,下列说法正确的有() Ⅰ、股东会议由
三、(101~120题)电气与仪表设备安装 流量检测仪表的节流件在安装时应符合
最新回复
(
0
)