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Expert reply
17 Apr 2015, 10:24
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:29) correct
17%
(01:40)
wrong
based on 833
sessions
History
Date
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Dried grass clippings mixed into garden soil gradually decompose, providing nutrients for beneficial soil bacteria. This results in better-than-average plant growth. Yet mixing fresh grass clippings into garden soil usually causes poorer than-average plant growth.
Which one of the following, if true, most helps to explain the difference in plant growth described above?
(A) The number of beneficial soil bacteria increases whenever any kind of plant material is mixed into garden soil.
(B) Nutrients released by dried grass clippings are immediately available to beneficial soil bacteria.
(C) Some dried grass clippings retain nutrients originally derived from commercial lawn fertilizers, and thus provide additional enrichment to the soil.
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.
(E) When a mix of fresh and dried grass clippings is mixed into garden soil, plant growth often decreases.
Source: LSAT
Which one of the following, if true, most helps to explain the difference in plant growth described above?
(A) The number of beneficial soil bacteria increases whenever any kind of plant material is mixed into garden soil.
(B) Nutrients released by dried grass clippings are immediately available to beneficial soil bacteria.
(C) Some dried grass clippings retain nutrients originally derived from commercial lawn fertilizers, and thus provide additional enrichment to the soil.
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.
(E) When a mix of fresh and dried grass clippings is mixed into garden soil, plant growth often decreases.
Source: LSAT
02 Mar 2021, 02:30
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souvik101990
Official Explanation
Our goal in this problem is to find the agent that causes fresh grass clippings to generate poorer-thanaverage plant growth. Choice (A) contradicts the implication of the passage. If fresh grass clippings increase beneficial soil bacteria, then plant growth should increase, not decrease. Choice (B) explains why dried grass clippings increase plant growth but does not explain why fresh grass clippings decrease plant growth. A similar analysis shows that choice (C) is incorrect. Choice (D) gives us our agent—heat.
The answer is (D).
Attachment:
2021-02-18_22-36-16.png [ 38 KiB | Viewed 8249 times ]
General Discussion
18 Apr 2015, 00:13
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Dried grass clippings mixed into garden soil gradually decompose, providing nutrients for beneficial soil bacteria.
This results in better-than-average plant growth.
Yet mixing fresh grass clippings into garden soil usually causes poorer than-average plant growth.
Which one of the following, if true, most helps to explain the difference in plant growth described above?
(A) The number of beneficial soil bacteria increases whenever any kind of plant material is mixed into garden soil.
(B) Nutrients released by dried grass clippings are immediately available to beneficial soil bacteria.
(C) Some dried grass clippings retain nutrients originally derived from commercial lawn fertilizers, and thus provide additional enrichment to the soil.
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.
(E) When a mix of fresh and dried grass clippings is mixed into garden soil, plant growth often decreases.
This results in better-than-average plant growth.
Yet mixing fresh grass clippings into garden soil usually causes poorer than-average plant growth.
Which one of the following, if true, most helps to explain the difference in plant growth described above?
(A) The number of beneficial soil bacteria increases whenever any kind of plant material is mixed into garden soil.
(B) Nutrients released by dried grass clippings are immediately available to beneficial soil bacteria.
(C) Some dried grass clippings retain nutrients originally derived from commercial lawn fertilizers, and thus provide additional enrichment to the soil.
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.
(E) When a mix of fresh and dried grass clippings is mixed into garden soil, plant growth often decreases.
