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Updated on: 11 Apr 2019, 07:39
Originally posted by vjsharma25 on 06 Apr 2011, 07:22.
Last edited by nightblade354 on 11 Apr 2019, 07:39, edited 2 times in total.
Last edited by nightblade354 on 11 Apr 2019, 07:39, edited 2 times in total.
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B
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69% (01:42) correct
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Fossilized teeth of an extinct species of herbivorous great ape have on them phytoliths, which are microscopic petrified remains of plants. Since only phytoliths from certain species of plants are found on the teeth, the apes' diet must have consisted only of those plants.
The argument assumes which one of the following?
(A) None of the plant species that left phytoliths on the apes' teeth has since become extinct.
(B) Plants of every type eaten by the apes left phytoliths on their teeth.
(C) Each of the teeth examined had phytoliths of the same plant species on it as all the other teeth.
(D) Phytoliths have also been found on the fossilized teeth of apes of other extinct species.
(E) Most species of great ape alive today have diets that consist of a fairly narrow range of plants.
The argument assumes which one of the following?
(A) None of the plant species that left phytoliths on the apes' teeth has since become extinct.
(B) Plants of every type eaten by the apes left phytoliths on their teeth.
(C) Each of the teeth examined had phytoliths of the same plant species on it as all the other teeth.
(D) Phytoliths have also been found on the fossilized teeth of apes of other extinct species.
(E) Most species of great ape alive today have diets that consist of a fairly narrow range of plants.
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06 Apr 2011, 12:17
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It's clearly (B)
Consider: apes might have eaten other plants, but scientists can't find any evidences, because these plants didn't leave phytoliths. So the conclusion will be flawed in this case.
Consider: apes might have eaten other plants, but scientists can't find any evidences, because these plants didn't leave phytoliths. So the conclusion will be flawed in this case.
06 Apr 2011, 12:35
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I agree with the post above, .
Argument summary;
x has been found on the fossilized teeth of an ape. Only certain variation of x are found on the teeth. Thus, the ape only ate those variations of x.
What is the argument assuming? Many things but more notably,
- All plants the ape ate would have left x.
- Wear and tear would not cause some x to fall off.
- X wasn't added to the apes teeth after he died.
etc...
(A) is wrong. If the plants became extinct or not is irrelevant. They could still have left x.
(B) is correct. This is the same as one of the assumption I wrote above ("All plants the ape ate would have left x).
(C) is wrong. Which x were on which teeth is irrelevant.
(D) is wrong. This would actually provide evidence that the conclusion is incorrect, so, obviously the author is not assuming it. Assumption are things that must be true to make teh conclusion true.
(E) is wrong. It is irrelevant what ape species today eat. The authoer is talkinga bout ancient apes, not modern ones.
If anything I wrote above is unclear, please ask me to clarify.
Thanks,
Jared
Argument summary;
x has been found on the fossilized teeth of an ape. Only certain variation of x are found on the teeth. Thus, the ape only ate those variations of x.
What is the argument assuming? Many things but more notably,
- All plants the ape ate would have left x.
- Wear and tear would not cause some x to fall off.
- X wasn't added to the apes teeth after he died.
etc...
(A) is wrong. If the plants became extinct or not is irrelevant. They could still have left x.
(B) is correct. This is the same as one of the assumption I wrote above ("All plants the ape ate would have left x).
(C) is wrong. Which x were on which teeth is irrelevant.
(D) is wrong. This would actually provide evidence that the conclusion is incorrect, so, obviously the author is not assuming it. Assumption are things that must be true to make teh conclusion true.
(E) is wrong. It is irrelevant what ape species today eat. The authoer is talkinga bout ancient apes, not modern ones.
If anything I wrote above is unclear, please ask me to clarify.
Thanks,
Jared
