首页
登录
职称英语
The presence of microorganisms that produce a toxin causes seawater to turn brow
The presence of microorganisms that produce a toxin causes seawater to turn brow
游客
2024-01-13
41
管理
问题
The presence of microorganisms that produce a toxin causes seawater to turn brownish red, a phenomenon known as a red tide. Sea otters do not feed in areas where clams, their main source of food, have become contaminated with this toxin. According to a proposed explanation of the otters’ behavior, the otters sample the clams in a potential feeding area and can taste any toxin in them. Which of the following, if true, would most strongly indicate that the hypothesis described in the last sentence of the passage is not correct?
选项
A、In some of the areas where red tides occur, neither clams nor sea otters are indigenous species.
B、The presence of sea otters in a given area has a significant effect on which other marine organisms are to be found in that area.
C、When seawater in an area unaffected by red tide is artificially dyed brownish red, sea otters do not feed on the clams in that area.
D、If the clams in a given area are contaminated with toxins, sea otters move to other areas in search of food.
E、Although very small amounts of the toxin produced during a red tide are not harmful, large doses can be fatal to animals the size of sea otters.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3358530.html
相关试题推荐
Acertaintirecompanycanproducetiresatacostof$22,500perbatchplus$9
Excessinventory,amassiveproblemformanybusi-nesses,hasseveralcauses,s
Excessinventory,amassiveproblemformanybusinesses,hasseveralcauses,
Excessinventory,amassiveproblemformanybusinesses,hasseveralcauses,
ThebodyofanyoneinfectedbyvirusXwill,afteraweek,produceantibodiesto
Scientificresearchthatinvolvesinternationalcollaborationhasproducedpaper
Prolongedandunseasonablefrostsproducefrostringsindeciduoustrees,which
ManyresearchersbelievethatthepresenceofRNAinbraincellsisthebiochemi
Byexaminingfossilizedbeetles,aresearchteamhasproducedthemostdetailed
Ifaninvestmenthasproducednoprofit,taxreliefpredicatedonhavingmadeth
随机试题
WashingtonIrvingwasAmerica’sfirstmanofletterstobeknowninternatio
[originaltext]Mr.Hooper,Ihavebeenwiththiscompanynowforsevenyears
ShortlyafterthedeathofemperorTheodosiusin395A.D.,theRomanEmpire
Hesaid,"I________alotofnewwordsbytheendoflastyear."A、hadalreadylea
ResalePriceMaintenanceisthenameusedwhenaretaileriscompelledtos
Itwastheworsttragedyin【C1】______history,sixtimesmoredeadlythanthe
电磁场的确切概念是什么A.电场产生磁场 B.电场、磁场 C.变化的电场与变化
SF6断路器气动机构操作机构远方/就地切换开关失灵,导致开关无法遥控操作,应定性
A.氟桂嗪 B.硝苯地平 C.地尔硫 D.维拉帕米 E.氨氯地平t最长的
发电机转子穿装前应单独进行()。A.气密性试验 B.磁道通路试验
最新回复
(
0
)