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
9
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/3373910.html
相关试题推荐
[originaltext] (16)Theysaythatelephantsneverforget;itturnsouttheyca
[originaltext] (16)Theysaythatelephantsneverforget;itturnsouttheyca
Don’tforgetto______well.Itisverycoldoutside.A、dressupB、wrapupC、close
Don’tforget______thewindowbeforeleavingtheroom.A、tohaveclosedB、toclose
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
73.Everyonebecomesalittlemoreforgetfulastheygetolder,butmen’smi
据说有些单亲家庭的孩子生活很悲惨。Itissaidthatinsomesingle-parentfamilieschildrenlivea
Timwillnot(lent)youthebook(because)heisfearful(if)youwillforgetto
Malestudentsemitmoreheatthanfemalestudentsdo,andthelargerastudenti
随机试题
WhichofthefollowingisNOTtrue,accordingtothepassageyouhavejustheard
Whatisthereasonforexpectingthenarrowingoftradegap?[originaltext]M
WelcometovisitourcompanyandIamverygladtohavetheopportunity
影响旅游需求的客源地因素中,人口结构是指人口的()。A.年龄 B.性别
秦艽主治( )。A.风寒湿邪 B.腰膝酸软 C.吐泻转筋 D.湿热黄疸
阅读下列材料,回答问题。 对如何突破“居民和聚落”教学重难点,王老师做了如下
关于妇人阴疮下列哪项是错误的A.临床主要见于热毒证和寒湿证 B.又称为"阴蚀"
患者,男性,22岁,刚刚诊断为艾滋病,该病人认为自己患病是一种惩罚,并且认为患的
影响需求变动的主要因素有( )。A.生产技术 B.消费者偏好 C.替代品的
(2010年真题)《建设工程监理规范》规定,编制监理实施细则的依据有()。
最新回复
(
0
)