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10 Aug 2018, 09:17
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
79% (01:35) correct
21%
(01:52)
wrong
based on 312
sessions
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Shark teeth are among the most common vertebrate fossils; yet fossilized shark skeletons are much less common—indeed, comparatively rare among fossilized vertebrate skeletons.
Which one of the following, if true, most helps to resolve the apparent paradox described above?
(A) Unlike the bony skeletons of other vertebrates, shark skeletons are composed of cartilage, and teeth and bone are much more likely to fossilize than cartilage is.
(B) The rare fossilized skeletons of sharks that are found are often found in areas other than those in which fossils of shark teeth are plentiful.
(C) Fossils of sharks’ teeth are quite difficult to distinguish from fossils of other kinds of teeth.
(D) Some species of sharks alive today grow and lose many sets of teeth during their lifetimes.
(E) The physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons.
Source: LSAT
Which one of the following, if true, most helps to resolve the apparent paradox described above?
(A) Unlike the bony skeletons of other vertebrates, shark skeletons are composed of cartilage, and teeth and bone are much more likely to fossilize than cartilage is.
(B) The rare fossilized skeletons of sharks that are found are often found in areas other than those in which fossils of shark teeth are plentiful.
(C) Fossils of sharks’ teeth are quite difficult to distinguish from fossils of other kinds of teeth.
(D) Some species of sharks alive today grow and lose many sets of teeth during their lifetimes.
(E) The physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons.
Source: LSAT
10 Aug 2018, 22:30
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Prethinking : Shark teeth are among the most common vertebrate fossils and shark skeletons are much less common fossils. There may be many reasons for this. Each shark has many teeth compared to one skeleton, the teeth are more likely to fossilize than skeleton etc.
(A) Unlike the bony skeletons of other vertebrates, shark skeletons are composed of cartilage, and teeth and bone are much more likely to fossilize than cartilage is.
This aligns with the prethiking. The teeth and skeleton are made up of different material and hence they fossilize differently. This explains the reason why shark teeth are more common that skeleton to fossilize.
(B) The rare fossilized skeletons of sharks that are found are often found in areas other than those in which fossils of shark teeth are plentiful.
This doesn't talk about the reason why shark teeth are most common vertebrate fossils INCORRECT
(C) Fossils of sharks’ teeth are quite difficult to distinguish from fossils of other kinds of teeth.
The arguments already talks about shark teeth. This option talks about distinguishing between shark teeth and other animals teeth which is unrelated. INCORRECT
(D) Some species of sharks alive today grow and lose many sets of teeth during their lifetimes.
This option is a trap answer. This option talks about the sharks that are alive today while the arguments talks about fossils. INCORRECT
(E) The physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons.
This doesn't explain the argument. If the physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons, then both shark teeth and shark skeletons are common which is INCORRECT
Hence option A
(A) Unlike the bony skeletons of other vertebrates, shark skeletons are composed of cartilage, and teeth and bone are much more likely to fossilize than cartilage is.
This aligns with the prethiking. The teeth and skeleton are made up of different material and hence they fossilize differently. This explains the reason why shark teeth are more common that skeleton to fossilize.
(B) The rare fossilized skeletons of sharks that are found are often found in areas other than those in which fossils of shark teeth are plentiful.
This doesn't talk about the reason why shark teeth are most common vertebrate fossils INCORRECT
(C) Fossils of sharks’ teeth are quite difficult to distinguish from fossils of other kinds of teeth.
The arguments already talks about shark teeth. This option talks about distinguishing between shark teeth and other animals teeth which is unrelated. INCORRECT
(D) Some species of sharks alive today grow and lose many sets of teeth during their lifetimes.
This option is a trap answer. This option talks about the sharks that are alive today while the arguments talks about fossils. INCORRECT
(E) The physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons.
This doesn't explain the argument. If the physical and chemical processes involved in the fossilization of sharks’ teeth are as common as those involved in the fossilization of shark skeletons, then both shark teeth and shark skeletons are common which is INCORRECT
Hence option A
28 May 2025, 01:28
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