LSAT 113 – Section 2 – Question 20

LSAT 113 - Section 2 - Question 20

June 2002

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT113 S2 Q20
+LR
Except +Exc
Strengthen +Streng
A
28%
156
B
58%
162
C
7%
153
D
4%
156
E
3%
157
144
156
167
 +Harder 147.106 +SubsectionMedium

Antarctic seals dive to great depths and stay submerged for hours. They do not rely solely on oxygen held in their lungs, but also store extra oxygen in their blood. Indeed, some researchers hypothesize that for long dives these seals also store oxygenated blood in their spleens.

Summarize Argument
Researchers hypothesize that seals store oxygenated blood in their spleens. No support is provided for this claim.

Notable Assumptions
The researchers assume that oxygenated blood can be stored in the spleen. They also assume that seals have some reason for doing so.

A
Horses are known to store oxygenated blood in their spleens for use during exertion.
Horses can store oxygenated blood in their spleens. This means that seals—another mammal—might be able to store oxygenated blood in their spleens, too.
B
Many species of seal can store oxygen directly in their muscle tissue.
The spleen isn’t a muscle. We therefore don’t care whether or not seals can store oxygen in their muscle tissue.
C
The oxygen contained in the seals’ lungs and bloodstream alone would be inadequate to support the seals during their dives.
Seals need to store oxygen somewhere besides their lungs and bloodstream. The spleen is one such place oxygen could be stored.
D
The spleen is much larger in the Antarctic seal than in aquatic mammals that do not make long dives.
Why do Antarctic seals have enlarged spleens? Perhaps for storing oxygenated blood.
E
The spleens of Antarctic seals contain greater concentrations of blood vessels than are contained in most of their other organs.
This implies that Antarctic seals’ spleens are specially designed for storing oxygenated blood. Thus, there’s good reason to believe they really do store oxygenated blood in their spleens.

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LSAT PrepTest 113 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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