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
2025-03-12
36
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] We can infer from the passage that elephants may ______
选项
A、run into other elephant families
B、give wrong warnings to their mothers
C、run away on hearing a strange sound
D、produce more babies by gathering together often
答案
A
解析
可通过排除法排除B、C、D。
转载请注明原文地址:https://tihaiku.com/zcyy/3994049.html
相关试题推荐
Elephantsdon’tforget—atleast,femaleelephantsdon’t.Elephantfamiliesa
Elephantsdon’tforget—atleast,femaleelephantsdon’t.Elephantfamiliesa
Elephantsdon’tforget—atleast,femaleelephantsdon’t.Elephantfamiliesa
Waterisnecessaryforlifeandgoodhealth.Weoftenforgetthisfactwhen
Waterisnecessaryforlifeandgoodhealth.Weoftenforgetthisfactwhen
Iwillneverforget______youforthefirsttime.A、tomeetB、tohavemeetC、meet
Manypeoplewronglybelievethatwhenpeoplereacholdage,theirfamiliesp
Manypeoplewronglybelievethatwhenpeoplereacholdage,theirfamiliesp
Manypeoplewronglybelievethatwhenpeoplereacholdage,theirfamiliesp
Manypeoplewronglybelievethatwhenpeoplereacholdage,theirfamiliesp
随机试题
YouwillhearareportpresentedbyajournalistfromTokyo.Foreachquestion(2
WhatCanMoneyBringus[originaltext]Todaymoreand
TheImportanceofTimeI.Introduction1)theissuesof【
[originaltext](1)Risinglevelsofobesityandunhealthyweightscouldbeli
下列运输成本中,属于船舶经营成本的是()。A.折旧费 B.燃料费 C.
煤矿的地面消防水池必须经常保持不少于()m3的水量。A.100 B.200
首次公开发行并上市要求资金条件、盈利水平等指标较宽松的是()。A.全国中小企业股
商业银行应用衍生金融工具对冲市场风险,可能面临的问题有()。A:衍生产品种类有限
下列法院对于诉讼中出现的各种情况的处理,做法正确的是:()A.刘某与韩某买卖合
在服务质量差距模型中,服务标准的差距指的是()之间的差距。A.顾客实际感受的服务
最新回复
(
0
)