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24 Dec 2015, 03:33
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Difficulty:
35%
(medium)
Question Stats:
69% (01:40) correct
31%
(01:57)
wrong
based on 965
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From last few years since 1972, pollution levels in Lake X have dropped considerably, primarily because of a state program to clean the lake water by means of a water refinery. Ironically, during this same period, the once-abundant population of sunfish in the lake has dwindled.
Which of the following, if true, would best explain why the sunfish population of Lake X has dwindled at the same time that the lake water has become cleaner?
A)The life spans of sunfish are not diminished by high pollution levels, but the number of offspring they create during their lifetime is diminished.
B)Several artificial chemicals are introduced into the lake as a result of the refinement process, but these chemicals are known to have a benign effect on fish.
C)The water refinement process creates an environment extremely favorable to pike, a predator fish feeding on all types of fishes.
D)The heaviest concentrations of sunfish population in the lake are at its northern and northeastern shores, many miles away from the water refinery.
E)Ever since 1972, a strictly enforced state regulation has prevented anglers from over-fishing Lake Thomas
Which of the following, if true, would best explain why the sunfish population of Lake X has dwindled at the same time that the lake water has become cleaner?
A)The life spans of sunfish are not diminished by high pollution levels, but the number of offspring they create during their lifetime is diminished.
B)Several artificial chemicals are introduced into the lake as a result of the refinement process, but these chemicals are known to have a benign effect on fish.
C)The water refinement process creates an environment extremely favorable to pike, a predator fish feeding on all types of fishes.
D)The heaviest concentrations of sunfish population in the lake are at its northern and northeastern shores, many miles away from the water refinery.
E)Ever since 1972, a strictly enforced state regulation has prevented anglers from over-fishing Lake Thomas
24 Dec 2015, 04:07
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A)The life spans of sunfish are not diminished by high pollution levels, but the number of offspring they create during their lifetime is diminished. - Incorrect - The number of offsprings they create may be less but even if each sunfish produces 1 offspring, the lake will still have an abundant number of sunfishes.
B)Several artificial chemicals are introduced into the lake as a result of the refinement process, but these chemicals are known to have a benign effect on fish. - Incorrect - If the chemicals have a benign effect, they should increase the number of sunfishes
C)The water refinement process creates an environment extremely favorable to pike, a predator fish feeding on all types of fishes. - Correct - This option helps explain the paradox by stating that the sunfish population has dwindled now due to an increase in pike fish population.
D)The heaviest concentrations of sunfish population in the lake are at its northern and northeastern shores, many miles away from the water refinery. - Incorrect
E)Ever since 1972, a strictly enforced state regulation has prevented anglers from over-fishing Lake Thomas - Incorrect
Answer: C
B)Several artificial chemicals are introduced into the lake as a result of the refinement process, but these chemicals are known to have a benign effect on fish. - Incorrect - If the chemicals have a benign effect, they should increase the number of sunfishes
C)The water refinement process creates an environment extremely favorable to pike, a predator fish feeding on all types of fishes. - Correct - This option helps explain the paradox by stating that the sunfish population has dwindled now due to an increase in pike fish population.
D)The heaviest concentrations of sunfish population in the lake are at its northern and northeastern shores, many miles away from the water refinery. - Incorrect
E)Ever since 1972, a strictly enforced state regulation has prevented anglers from over-fishing Lake Thomas - Incorrect
Answer: C
24 Dec 2015, 05:48
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ans: C
will explain why the population dwindled inspite of cleaning.
solved this in 1 minute.
Chetan2u could u just tell what is difficulty level of this question.
will explain why the population dwindled inspite of cleaning.
solved this in 1 minute.
Chetan2u could u just tell what is difficulty level of this question.
