LSAT 109 – Section 3 – Question 10

LSAT 109 - Section 3 - Question 10

December 2000

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Question QuickView	Type	Tags	Answer Choices	Curve	Question Difficulty	Psg/Game/S Difficulty	Explanation
PT109 S3 Q10	+LR	Most strongly supported +MSS Causal Reasoning +CausR Quantifier +Quant	A 4% 161 B 2% 161 C 5% 162 D 2% 155 E 87% 167	132 144 156	+Medium	148.18 +SubsectionMedium

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Summary

The ozone layer entirely filters out some wavelengths of light but lets others through. Dangers associated with holes in the ozone layer are well documented. However, one danger that is not talked about enough is that these holes could lead to severe eye damage for some species.

Strongly Supported Conclusions

Some wavelengths of light that could damage eyesight are more likely to reach the earth when there are holes in the ozone layer.

All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer, where it is intact.

This answer is unsupported. To say “all” wavelengths are filtered out is too strong here. We only know that the ozone layer filters out some wavelengths but not others. Additionally, we don’t know whether the filtered wavelengths are the same ones that could cause eye damage.

Few species of animals live on a part of the earth’s surface that is not threatened by holes in the ozone layer.

This answer is unsupported. We don’t have any information in the stimulus to determine where any species live.

Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight.

This answer is unsupported. To say that “some” species could suffer severe eye damage when exposed to unfiltered sunlight does not imply that there are some species that will not suffer any damage. “Some”, in this case, could mean “all.”

A single wavelength of sunlight can cause severe damage to the eyes of most species of animals.

This answer is unsupported. To say a “single wavelength” causes the damage is too strong. We know that there are wavelengths that cause damage, but we don’t know from the stimulus if it is one wavelength in particular.

Some wavelengths of sunlight that cause eye damage are more likely to reach the earth’s surface where there are holes in the ozone layer than where there are not.

This answer is strongly supported. We know from the stimulus that the ozone layer filters out some wavelengths. If there are holes in this layer, that makes it more likely that damaging wavelengths will not be filtered and cause eye damage.

LSAT 109 – Section 3 – Question 10

LSAT 109 - Section 3 - Question 10

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LSAT PrepTest 109 Explanations

Section 1 - Logical Reasoning

Section 2 - Reading Comprehension

Section 3 - Logical Reasoning

Section 4 - Logical Reasoning

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