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
25
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/3310535.html
相关试题推荐
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatresultdidtheresearchersexpect?A、Theyexpectedtheoverweightdogswould
Whatmethodisusedinthestudy?A、Physicalscience.B、Psychologicalscience.C、
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
随机试题
Oneoftheaimsofteachingscienceis,throughlearning,toenablestuden
Thehotelunderthisbuildinghas______foronlyfortypeople;itisfarfrome
以镇心安神,清热养血为主要功用的方剂是A、归脾汤 B、酸枣仁汤 C、天王补心
如果一个学生经常打瞌睡,最不恰当的处理方式是( )。A.让他的同桌叫醒他 B
基金托管人可以利用基金资产进行投资,为基金份额持有人谋取适当利益,但决不能为第三
1998年6月末,某商业银行的核心资本为69165万元,附属资本为2237万元,
如果货品供不应求或者买方资信不高,供货商大多要求预付货款或现货交易。()
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
利用横道图表示建设工程进度计划的优点有( )。A.明确反映关键线路B.明确反映
根据《水利工程施工安全管理导则》SL721—2015,项目法人组织制定的安全生
最新回复
(
0
)