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
41
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 does the writer explain?
选项
A、Neurotoxins.
B、Microscopic organisms.
C、Predators.
D、Fish walks.
答案
D
解析
细节题型见第三段最后一句: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.括号中的内容是对“fish walks”的解释,因此D为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3310142.html
相关试题推荐
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
AccordingtoMalawi’sMinisterofEducation,ScienceandTechnology,whatwillb
Implementationscienceisespeciallyimportantindevelopingcountries.A、正确B、错误
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
随机试题
Mrs.Weller:Welcome,Mr.Zhao.We’reverypleasedtohaveyouwithus.ZhaoKa
Whenanyofthemaximsunderthecooperativeprincipleisflouted,______might
IlostmysightwhenIwasfouryearsoldbyfallingoffaboxcarinafrei
Today,mostcountriesintheworldhavecanals.Manycountrieshavebuiltca
计算机系统中,显示器属于( )。A.感觉媒体 B.传输媒体 C.表现媒体
下列不属于导游申请复议权的是()。A.认为符合法定条件申领导游资格证书和导游证,
麝香的功效有A.活血散结 B.化湿辟秽 C.开窍醒神 D.催产止痛
在我国,“公民”一词的含义是指()。 A.年满18周岁具有我国国籍的人B.
团体心理咨询应遵循的原则有( )。A.共同的原则 B.综合的原则 C.
肺主气功能包括A.人体的生长发育 B.主一身之气 C.气的运化 D.主呼吸
最新回复
(
0
)