首页
登录
职称英语
It sounds like a science fiction, but researchers say it’s a scientific fact
It sounds like a science fiction, but researchers say it’s a scientific fact
游客
2023-12-27
82
管理
问题
It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too.
The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- literally, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding.
Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them.
Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation.
To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack. [br] Which of the following statements is true?
选项
A、Scientists have solved the mystery about the fish killer.
B、More studies need to be made about the fish killer.
C、It is proved that the algae are reducing fish populations.
D、Humans have already been affected by the toxin.
答案
B
解析
推断题型见第五段:To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack. 见下划线部分,因此可知还有更多的研究要做,因此B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3310536.html
相关试题推荐
ForfiveyearsIhavemaintainedournation’ssolidcommitmenttoscientific
ResearchershavefoundthevirusincivetcatsatalivefoodmarketinChina,b
她在其中扮演20世纪50年代到60年代的电影角色,这一系列类似电影剧照的作品令她一举成名。(beanimmediatehit)Afictionalar
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
随机试题
Newtechnologylinkstheworldasneverbefore.Ourplanethasshrunk.It’s
Astheconversationbegins,whatarethemanandwomandoing?[br][originaltex
Theysaidtheyhadnochoicebut______(wait)forthedoctortocome.towait动词不
世界卫生组织将冠心病分为哪几型()。A.心绞痛 B.心肌梗死 C.无症
重要工程的单桩承载力宜通过现场静载试验确定,在同一条件下试桩数量不宜少于总桩数的
以下关于GDP说法正确的是()。 Ⅰ.GDP有两种表现形态,即价值形态和产品
测绘航空摄影的影像质量检查包括影像的( )。A.清晰度 B.重叠度 C.色
供我国大陆地区个人或法人买卖的、以人民币标明票面金额并以人民币标明票面金额并以人
(2014年真题)下列分部分项工程中,其专项方案必须进行专家论证的有()。A.
屋面防水工程量计算中,正确的有()。A.型材屋面按设计图示尺寸以水平投影面
最新回复
(
0
)