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16 Mar 2023, 01:30
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Difficulty:
25%
(medium)
Question Stats:
81% (02:15) correct
19%
(02:19)
wrong
based on 122
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The presence of microorganisms that produce a toxin causes seawater to turn brownish red, 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?
(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 areas 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.
Which of the following, if true, would most strongly indicate that the hypothesis described in the last sentence of the passage is not correct?
(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 areas 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.
16 Mar 2023, 02:31
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imo option c correct
toxins produces sea water to become brownish red
he otters sample the clams in a potential feeding area and can taste any toxin in them.
but option c says
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
there are no toxins then also sea otters not feeding on clams
toxins produces sea water to become brownish red
he otters sample the clams in a potential feeding area and can taste any toxin in them.
but option c says
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
there are no toxins then also sea otters not feeding on clams
16 Mar 2023, 02:37
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The presence of microorganisms that produce a toxin causes seawater to turn brownish red, 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?
(A) In some of the areas where red tides occur, neither clams nor sea otters are indigenous species. - Whether they are indigenous or not, it does not affect the argument.
(B) The presence of sea otters in a given areas has a significant effect on which other marine organisms are to be found in that area. - It does not provide the alternative explanation for the otters' behavior. We do not know from this how do the otters know to avoid the contaminated areas other than tasting the toxins.
(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. - This shows that it is not the taste but the color of the tide that makes the otters behave in a certain way.
(D) If the clams in a given area are contaminated with toxins, sea otters move to other areas in search of food. - It does not provide the alternative explanation for the otters' behavior. We do not know from this how do the otters know to avoid the contaminated areas other than tasting the toxins.
(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. - Same as above
Which of the following, if true, would most strongly indicate that the hypothesis described in the last sentence of the passage is not correct?
(A) In some of the areas where red tides occur, neither clams nor sea otters are indigenous species. - Whether they are indigenous or not, it does not affect the argument.
(B) The presence of sea otters in a given areas has a significant effect on which other marine organisms are to be found in that area. - It does not provide the alternative explanation for the otters' behavior. We do not know from this how do the otters know to avoid the contaminated areas other than tasting the toxins.
(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. - This shows that it is not the taste but the color of the tide that makes the otters behave in a certain way.
(D) If the clams in a given area are contaminated with toxins, sea otters move to other areas in search of food. - It does not provide the alternative explanation for the otters' behavior. We do not know from this how do the otters know to avoid the contaminated areas other than tasting the toxins.
(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. - Same as above
