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02 Sep 2017, 09:41
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Difficulty:
85%
(hard)
Question Stats:
53% (02:28) correct
47%
(02:37)
wrong
based on 861
sessions
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The goblin fern, which requires a thick layer of leaf litter on the forest floor, is disappearing from North American forests. In spots where it has recently vanished, the leaf litter is unusually thin and, unlike those places where this fern still thrives, is teeming with the European earthworm Lumbricus rubellus, which eats leaf litter. L. rubellus is thus probably responsible for the fern's disappearance.
Which one of the following is an assumption on which the argument depends?
(A) Wherever there is a thick layer of leaf litter in North American forests, goblin ferns can be found.
(B) None of the eartbworms that are native to North America eat leaf litter.
(C) Dead leaves from goblin ferns make up the greater part of the layer of leaf litter on the forest floors where the goblin fem has recently vanished.
(D) There are no spots in the forests of North America where both goblin ferns and earthworms of the species L. rubellus can be found.
(E) L. rubellus does not favor habitats where the leaf litter layer is considerably thinner than what is required by goblin ferns.
Source: LSAT
Which one of the following is an assumption on which the argument depends?
(A) Wherever there is a thick layer of leaf litter in North American forests, goblin ferns can be found.
(B) None of the eartbworms that are native to North America eat leaf litter.
(C) Dead leaves from goblin ferns make up the greater part of the layer of leaf litter on the forest floors where the goblin fem has recently vanished.
(D) There are no spots in the forests of North America where both goblin ferns and earthworms of the species L. rubellus can be found.
(E) L. rubellus does not favor habitats where the leaf litter layer is considerably thinner than what is required by goblin ferns.
Source: LSAT
gmatexam439
GMAT 1: 730 Q49 V41
Posts: 1,054
02 Sep 2017, 12:38
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The goblin fern, which requires a thick layer of leaf litter on the forest floor, is disappearing from North American forests. In spots where it has recently vanished, the leaf litter is unusually thin and, unlike those places where this fern still thrives, is teeming with the European earthworm Lumbricus rubellus, which eats leaf litter. L. rubellus is thus probably responsible for the fern's disappearance.
Which one of the following is an assumption on which the argument depends?
(A) Wherever there is a thick layer of leaf litter in North American forests, goblin ferns can be found. -We already know this information from the passage. It can't be an assumption.
(B) None of the eartbworms that are native to North America eat leaf litter. -We are worried about the L. Rubellus earthworms. Out of scope.
(C) Dead leaves from goblin ferns make up the greater part of the layer of leaf litter on the forest floors where the goblin fem has recently vanished. -We are not worried about what constitute the various parts of leaf litter.
(D) There are no spots in the forests of North America where both goblin ferns and earthworms of the species L. rubellus can be found. -This will be a weakener.
(E) L. rubellus does not favor habitats where the leaf litter layer is considerably thinner than what is required by goblin ferns. -Correct. The L. Rubellus are found in thick covers of leaf litter that are essential for the growth of goblin fern.
Which one of the following is an assumption on which the argument depends?
(A) Wherever there is a thick layer of leaf litter in North American forests, goblin ferns can be found. -We already know this information from the passage. It can't be an assumption.
(B) None of the eartbworms that are native to North America eat leaf litter. -We are worried about the L. Rubellus earthworms. Out of scope.
(C) Dead leaves from goblin ferns make up the greater part of the layer of leaf litter on the forest floors where the goblin fem has recently vanished. -We are not worried about what constitute the various parts of leaf litter.
(D) There are no spots in the forests of North America where both goblin ferns and earthworms of the species L. rubellus can be found. -This will be a weakener.
(E) L. rubellus does not favor habitats where the leaf litter layer is considerably thinner than what is required by goblin ferns. -Correct. The L. Rubellus are found in thick covers of leaf litter that are essential for the growth of goblin fern.
02 Sep 2017, 12:48
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OA -> E
Opposite is not true i.e L rubellus is not there because leaf layer is already thin.
Opposite is not true i.e L rubellus is not there because leaf layer is already thin.
