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
2012-05-04
73
问题
Lightning bugs can blink themselves because of a chemical substance
(11)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、They use blinking signals to communicate.
B、They use blinking signals to seek for food.
C、They use blinking signals to attract their own species.
D、They use blinking signals to frighten and warn enemies.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/aGmK777K
0
专业英语四级
相关试题推荐
Jasonismostlikelyto
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletoputittouse.【C2】______,scientistsdiscoveredhow
Thereismuchdiscussiontodayaboutwhethereconomicgrowthisdesirable.Atanearlierperiod,ourdesireformaterialwealth
Ofthe349forestandgrasslandfires,
Thoughherparents______hermusicalability,Jerrilou’spianoplayingisreallyterrible.
Bytheendofnextmonthwe______thereviewontheresearchfindings.
Physicsisthepresent-dayequivalentof______usedtobecallednaturalphilosophy,fromwhichmostofpresent-daysciencearo
WhenSpanishfootballclubBarcelonapaidUS$35millionforRonaldinholastsummer,theyweren’tbuyingaprettyface."Iam【C1】
WhenSpanishfootballclubBarcelonapaidUS$35millionforRonaldinholastsummer,theyweren’tbuyingaprettyface."Iam【C1】
随机试题
人员密集场所补风口的风速不宜大于()。
Earlier,intheolddays,womenusedtositathomeseparatedfromtheoutsideworld.Theyusedtomanagethehomeandlookafte
肝内胆管结石的特征有
单纯性机械性肠梗阻的腹痛特点是
女,30岁。诉发热伴心前区隐痛,呼吸困难,颈静脉怒张。体检:体温39.2℃,血压120/78mmHg,心率110次/分,心电图示;ST段抬高,诊断为急性心包炎,治疗方法是
下列不属于自然地理环境的是()。
现浇板按图示面积乘以板厚以立方米计算,其中()。
根据《中华人民共和国会计法》的规定,国有资产占控股地位的大型企业必须设置总会计师。总会计师的任职资格、任免程序和职责权限由()。
“字字写来都是血,十年辛苦不寻常”和“文不甚深,言不甚俗”分别讲的是中国古典文学中的()。
推恩令
最新回复
(
0
)