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
70
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:http://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
(1)TheBonobosshoponlowerFifthAvenue,inManhattan,sitsinarowoffa
Manyofthethingswedodepend【16】______receivinginformationfromotherpe
Officialhealthadvicethatsaidhouseholdchoreshelpkeepyouactivehasb
村里的每个人都喜欢他,因为他对人很友好。Everyoneinthevillagelikeshim,becauseheisveryfriend
Thispartistotestyourabilitytodopracticalwriting.Youarerequiredtow
腰围垫能够A.减轻腰椎的承重 B.限制腰椎的运动 C.减轻疼痛 D.防止肌
某项目的利润分析如下表所示,贴现率为10%,则第二年结束时的利润总额的净现值为(
内服均能止血、止泻的药物是A.白矾 B.雄黄 C.降香 D.蜂房 E.硫
下列关于普通心肌细胞动作电位的描述,正确的是A.0期主要由Na+内流引起 B
ABC会计师事务所的A注册会计师负责审计甲公司2020年度财务报表,财
最新回复
(
0
)