首页
登录
职称英语
[originaltext] Today, we are going to talk about a special way some plants r
[originaltext] Today, we are going to talk about a special way some plants r
游客
2025-02-09
34
管理
问题
Today, we are going to talk about a special way some plants respond to being invaded by pests. The plants react by emitting a chemical signal, which acts like a call for help. Let’s take corn plants for example. Sometimes, caterpillars chew on the corn leaves. When the caterpillar saliva mixes with the chew portion of a leave, the plant releases a chemical scream that attracts wasps. The wasps respond to the signal by flying to the chewed on leave, and laying their eggs on the caterpillars. The caterpillars die in the next few days as the wasp offspring nourish themselves by feeding of them. Thus the corn plant prevents all its leaves from being eaten by the caterpillars. This chemical scream is specific. It’s only released after the plant has detected the caterpillar saliva. A plant that is cut by in the other means does not give off the same signal, nor doesn’t undamaged plants. This also explains how a wasp can find a caterpillar in a huge field of corn. Soybean, cotton and probably many other plants use similar type of defense against pests. By enhancing this natural response in plants, researchers might reduce, some day even eliminate, the need for chemical pesticide, which can cause ecological damage. For example, scientists might breed plants for this screaming trait, or they might transplant specific genes to increase the release of the chemical signals.
选项
A、Caterpillars chewing on its leaves
B、Wasps laying eggs on its leaves
C、Pesticides sprayed on its leaves
D、Knives cutting its stalk
答案
A
解析
What causes the corn plant to emit the chemical signal?
转载请注明原文地址:http://tihaiku.com/zcyy/3949106.html
相关试题推荐
Seahorses(usually)livealongtheshoreamongseaweedand(other)plantstowh
[originaltext]Today,wearegoingtocontinueourdiscussionofBuddhism.I
[originaltext]Today,wearegoingtocontinueourdiscussionofBuddhism.I
[originaltext]Today,wearegoingtocontinueourdiscussionofBuddhism.I
[originaltext]Today,wearegoingtocontinueourdiscussionofBuddhism.I
[originaltext]M:IamsorelievedIjustfinishedthestoryIwasworkingonfo
[originaltext]M:IamsorelievedIjustfinishedthestoryIwasworkingonfo
[originaltext]W:DrManning,doyouhaveafewminuets.I’dliketoaskyouabo
[originaltext]W:DrManning,doyouhaveafewminuets.I’dliketoaskyouabo
[originaltext]W:DrManning,doyouhaveafewminuets.I’dliketoaskyouabo
随机试题
QueenMary’sReignI.HistoriceventsA.KingHenryVIIIplannedMary,his【T1】
【B1】[br]【B2】A、opportunityB、chanceC、likelyD、occurB同义名词辨析。通过分析可知考查的是“机率”chan
当木桁架支座节点采用齿连接时,下列做法何项正确?()A.必须设置保险螺栓
论数据访问层设计技术及其应用 在信息系统的开发与建设中,分层设计是一种常见的架
有关黄斑的发育,下列描述正确的是A.胚胎4个月时出现中心凹 B.婴儿出生后黄斑
根据《建筑法》,建筑工程采用联合承包的,关于联合承包的说法不正确的是()。A:
2018年3月,某审计组对甲公司2017年度财务收支情况进行了审计。有关销售与收
B
关于犯罪停止形态的论述,下列哪些选项是正确的?()A.甲(总经理)召开公司
壁后注浆,一般是()进行,注浆段高,视含水层赋存条件和具体出水点位置而定,段高
最新回复
(
0
)