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
Lightning bugs can blink themselves because of a chemical substance
Lightning bugs can blink themselves because of a chemical substance
admin
2013-08-03
48
问题
Lightning bugs can blink themselves because of a chemical substance
Lightning bugs are one special species in nature, they have own feature in the abdomen of their bodies, in which there is a chemical substance. And they can light them up and control when they blink and how long they blink.(12)But why lightning bugs light up? The following reasons may account for this. They are basically to find a mate. It’s a way that lightning bugs communicate with each other. They use their blinking signals to attract each other.(13)The female lightning bugs have brighter and stronger light, because they are the ones who are trying to attract males to them.(12)And different species of lightning bugs have different patterns of flashing light to attract their own species. For example, if there are five different species of lightning bugs all in the same field, they can tell who is their same species and who is not.(12)On other condition, lightning bugs light up when they see their enemies. They aim to frighten and warn the enemies by doing this. Some researchers once made experiments on mice in 1997; they confirm that light given off by lightning bugs plays a warning role on mice. This result of research is beyond people’s expectation.
选项
A、Because they have different physical construction.
B、Because they are more offensive than male lightning bugs.
C、Because they want to frighten their enemies.
D、Because they try to attract males to them.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/JhLK777K
0
专业英语四级
相关试题推荐
Mostpeoplewoulddescribeadollarmillionaireasrich,yetmanymillionaireswoulddisagree.Theydonotcomparethemselveswi
Educatorstodayismoreandmoreoftenhardtosaythatcomputerliteracyisabsolutelynecessaryforcollegestudents.Manyeve
Thatwasnotthefirsttimehe_______us.Ithinkit’shightimewe_______strongactionsagainsthim.
Idon’trecollect______hercryinpublicbefore.
NomatterhowmanytimesyouhaveseenimagesofthegoldenmaskofboykingTutankhamen,comefacetofacewithitinEgypt’sCa
Inthesentence"ItiseveryMondayafternoonthatProfessorAndersongiveslecturesoninternationalfinance",theitalicized
Thejoysoftravel,havinglong______thedisabled,areopeningupvirtuallyanyonewhohasthemeans.
What’sthedifferencebetweentheAsianelephantandtheAfricanelephant?
Accordingtohistoricalevidence,theChinesehaveusedchopstickssincethetimeoftheShangDynasty(ca1766-1066BCE).Thefi
Accordingtohistoricalevidence,theChinesehaveusedchopstickssincethetimeoftheShangDynasty(ca1766-1066BCE).Thefi
随机试题
技术
医用纱布选购和使用注意事项不包括()
某企业购入面值为50000元的复利债券,利率为10%,期限为3年,3年后该债券的本利和为()元。
企业集团的特征包括()
主观唯心主义认为人的主观精神(如目的、意志、感觉、经验、心灵等)是世界的本原。客观唯心主义认为上帝‘、理念等客观精神是先于物质世界并独立于物质世界而存在的本体.而物质世界不过是这种客观精神的外化,前者是本原的,第一性的,后者是派生的、第二性的。根据上述定义
市场机会就是市场上存在的未满足的需求。有时人们称它为潜在的市场,亦即客观上已经存在或即将形成,而尚未被人们认识的市场。根据上述定义,下列属于市场机会的是:
行政处理:是行政主体为了实现相应法律、法规和规章确定的行政管理目标和任务,应行政相对人申请或依职权处理涉及特定行政相对人特定权利义务事项的具体行政行为。所谓行政相对人是指在行政法律关系中与行政主体相对应的另一方当事人。根据上述定义,下列行为属于行政处理的是
以下关于人民代表大会的说法中,不正确的是()
我国物权法规定的用益物权有哪些()
“年龄在18-25之间”这种约束是属于数据库当中的
最新回复
(
0
)