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
What do plants do when they are thirsty?
What do plants do when they are thirsty?
admin
2015-06-27
12
问题
What do plants do when they are thirsty?
We all scream for water when thirsty. But do you know [15A] in very hot, dry weather plants also make faint sounds — as if they’re crying out for help?
You see, in a plant’s stem there’re hundreds of "water pipes" that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises 10,000 times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. He also knows that [16D] many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not? Robert thinks that the insects may listen for the plants that cry. And then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so the plant sounds thirsty. Then he watches insects to see if they attack more often than usual.
[17D]If his is right, scientists could use the insects’ ability against them. They could build traps that imitate crying plants. So when the insects buzz in to eat, they won’t buzz out.
选项
A、They give out faint cries.
B、They make noises to drive away insects.
C、They extend their water pipes.
D、They become elastic like rubber bands.
答案
A
解析
题干关键词为plant,thirsty,所以注意相关信息。由原文提到的…in very hot,dry weather plants also make faint sounds…可知答案为[A]。
转载请注明原文地址:https://www.kaotiyun.com/show/oFXK777K
0
专业英语四级
相关试题推荐
MadeinChina中国制造Thelabel,MadeinChina,isonethatisbecomingincreasingcommon/inshoppingcentersalloverthewo
Whatshouldbedoneinordertofeedalargepopulation?
Goodmorning,everyoneandwelcometotheEnglishforAcademicPurposesCenter.I’dliketobeginbybriefly【D1】______theservi
Fewpeopleexpectluxurywhileflying,butthesedays,eventhebasicsseemtobeinbadshape.It’snotuncommontofindyourt
ForwhatisSpitzerforcedtoresign?
WhichofthefollowingisNOTthereasonofSyrian’swithdrawalfromLebanon?
Theoriginsofthehomecatisgenerallythoughttodatebackto
Thoughheviewshimselfasarealist,Cetronsaysthathisfindingsmakehimvery______aboutfuture.
"Ican’tpraisehishighefficiency______",Georgesaid,"eventhoughIdon’tlikehimpersonally."
Fromthehealthpointofviewwearelivinginamarvellousage.Weareimmunizedfrombirthagainstmanyofthemostdangerous
随机试题
根据企业国有资产法律制度的规定,下列资产中,不属于国有资产的有()。
高血压病人短期血压明显升高出现中枢神经功能障碍考虑为()
某肺叶发生肺不张时,典型的X线表现是()
男性,30岁,鼻部疖,经挤压后,病人出现寒战,高热,头痛,眼部周围组织红肿疼痛等,应考虑并发:
患者,男,56岁,心肌梗死昏迷入院。此患者应安置在
试述股票与公司债券的异同点。
描述计算机内存的性能指标包括()。
材料1:21世纪的“00年代”,对中国造纸业来说,是高速发展的“黄金十年”。2000年,中国造纸业的年产量为3050万吨,居世界第三;2009年,中国制纸业年产量达到8640万吨,十年翻了近丽番,中国已成为世界造纸第一生产大国。在经历了
根据下列材料回答问题。根据资料,下列表述正确的是()。
PeterFernwasmadonmountains.Climbingwastheloveofhislife.Churchtowers,seasidecliffs,rockfaces,icemountains,an
最新回复
(
0
)