LSAT 135 – Section 4 – Question 06

LSAT 135 - Section 4 - Question 06

December 2011

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT135 S4 Q06
+LR
Inference +Inf
Causal Reasoning +CausR
A
1%
155
B
2%
156
C
2%
155
D
4%
155
E
92%
165
135
143
151
 +Medium 147.853 +SubsectionMedium

The calm, shallow waters of coastal estuaries are easily polluted by nutrient-rich sewage. When estuary waters become overnutrified as a result, algae proliferate. The abundant algae, in turn, sometimes provide a rich food source for microorganisms that are toxic to fish, thereby killing most of the fish in the estuary.

Summary
Nutrient-rich sewage can pollute and overnutrify estuary waters.
Overnutrified estuary waters cause algae to proliferate.
Abundant algae can be a food source for microorganisms that are toxic to fish.
These microorganisms kill most fish in the estuary.

Very Strongly Supported Conclusions
Abundant algae in an estuary can cause most fish in the estuary to die.
Overnutrified estuary waters can cause most fish in the estuary to die.
Nutrient-rich sewage pollution can cause most fish in an estuary to die.

A
Fish in an estuary that has been polluted by sewage are generally more likely to die from pollution than are fish in an estuary that has been polluted in some other way.
Unsupported. Nutrient-rich sewage can kill most fish in an estuary, but we don’t know that it’s more likely to than other forms of pollution.
B
In estuary waters that contain abundant algae, microorganisms that are toxic to fish reproduce more quickly than other types of microorganisms.
Unsupported. Abundant algae can be a food source for toxic microorganisms, but we don’t know that it causes toxic microorganisms to reproduce more quickly than other types of microorganisms.
C
Nutrients and other components of sewage do not harm fish in coastal estuaries in any way other than through the resulting proliferation of toxic microorganisms.
Unsupported. Nutrient-rich sewage can harm fish in estuaries by causing algae to grow, which feeds toxic microorganisms. But it might harm fish in other ways too.
D
Algae will not proliferate in coastal estuaries that are not polluted by nutrient-rich sewage.
Unsupported. Overnutrified waters do cause algae to proliferate, but it might proliferate in other conditions too.
E
Overnutrifying estuary waters by sewage can result in the death of most of the fish in the estuary.
Very strongly supported. Overnutrified estuary waters cause algae to proliferate, which can then feed toxic microorganisms that kill most fish in the estuary. So, nutrient-rich sewage pollution can cause the death of most fish in an estuary.

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LSAT PrepTest 135 Explanations

Section 1 - Logical Reasoning

Section 2 - Logical Reasoning

Section 3 - Reading Comprehension

Section 4 - Logical Reasoning

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