LSAT 119 – Section 3 – Question 18

LSAT 119 - Section 3 - Question 18

June 2005

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT119 S3 Q18
+LR
Argument part +AP
Causal Reasoning +CausR
A
0%
153
B
3%
155
C
82%
165
D
1%
152
E
14%
160
129
143
156
 +Medium 145.195 +SubsectionEasier

A seriously maladaptive trait is unlikely to persist in a given animal population for long, since there is enough genetic variation in populations that some members will lack the trait. Those lacking the trait will compete more successfully for the available resources. Hence these members of the population survive and reproduce at a higher rate, crowding out those with the maladaptive trait.

Summarize Argument
In a population of animals, a trait that is very maladaptive will not last long. Some animals will not have the trait because of genetic variation across the population. Those without it will be stronger and more successful in competing for resources. Because they are more successful, more without the trait will survive and reproduce, and will eventually overtake those with the trait.

Identify Argument Part
This is a premise that lends support to the argument. It lets us know why those without the trait will survive at higher rates and be able to crowd out those with it. That lets us know why the trait will not last long in the population. The proposition doesn’t receive any support, so it’s just a regular old premise.

A
It expresses a view that the argument as a whole is designed to discredit.
The argument is not trying to discredit the statement in question. It takes the statement as true and uses it to support why a maladaptive trait won’t last long.
B
It is the argument’s main conclusion.
This proposition doesn’t receive any support, so it can’t be any kind of conclusion. Instead, it is a statement that supports the argument.
C
It is a premise of the argument.
This is accurate because the proposition just lends support in the argument.
D
It presents evidence that the argument attempts to undermine.
The evidence supports the conclusion. The argument recognizes this evidence as true and uses it to support the argument.
E
It is an intermediate conclusion of the argument.
It cannot be an intermediate conclusion because it doesn’t get support from any other part of the argument.

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LSAT PrepTest 119 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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