LSAT 138 – Section 3 – Question 02

LSAT 138 - Section 3 - Question 02

December 2012

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT138 S3 Q02
+LR
Most strongly supported +MSS
Causal Reasoning +CausR
A
1%
152
B
2%
151
C
1%
154
D
92%
165
E
4%
156
135
143
150
 +Medium 147.528 +SubsectionMedium

Forest fragmentation occurs when development severs a continuous area of forest, breaking it down into small patches. Some animals, such as white-footed mice, thrive in conditions of forest fragmentation, reaching their highest population densities in small forest patches. These mice are the main carrier of the bacteria that cause Lyme disease, a debilitating illness that is often transmitted from white-footed mice to humans by deer ticks.

Summary
Forest fragmentation happens when development cuts large forests into smaller pieces. Some animals, like white-footed mice, thrive and multiply in these conditions. These mice are the main carrier of the bacteria that cause Lyme disease, which is passed to humans by deer ticks that bite the mice. Lyme disease is a debilitating illness.

Strongly Supported Conclusions
Forest fragmentation can be beneficial for some animals.
Combatting forest fragmentation may decrease populations of white-footed mice.
Combatting forest fragmentation may lessen instances of Lyme disease among humans.
Combatting forest fragmentation can be beneficial for human health.

A
White-footed mice are very rarely found in unfragmented forests.
This is unsupported. The stimulus only tells us that white-footed mice thrive in fragmented forests, but gives no information about their existence or wellbeing in unfragmented forests.
B
The population density for most species of small animals increases when a continuous area of forest becomes fragmented.
This is unsupported. The stimulus only speaks to the population density of white-footed mice in fragmented forests. It gives no information about the population-density of any other species of small animals.
C
Forest fragmentation reduces the number and variety of animal species that an area can support.
This is unsupported. The stimulus does not tell us about the effects of forest fragmentation on other animal species apart from white-footed mice or on the biodiversity of an area as a whole.
D
Efforts to stop the fragmentation of forests can have a beneficial effect on human health.
This is strongly supported. Stopping forest fragmentation can decrease the population density of white-footed mice, which carry the bacteria that cause Lyme disease. Thus, it can have a beneficial effect on human health by reducing the risk of Lyme disease.
E
Deer ticks reach their highest population densities in small forest patches.
This is unsupported. We are told that white-footed mice reach their highest population densities in small forest patches. The only thing we know about deer ticks is that they can transmit Lyme disease.

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LSAT PrepTest 138 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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