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#Top150 CR: On a recent expedition to a remote region of northern

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#Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 07 Dec 2015, 00:36
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Question Stats:

28% (01:29) correct 72% (01:52) wrong based on 191 sessions

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On a recent expedition to a remote region of northern Canada, scientists uncovered skeletal remains from about 100,000 years ago. Surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees Fahrenheit (or 538 degrees Celsius).

Which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures?

A. Other scientific research released two years before the expedition showed that the remote region of northern Canada underwent considerable warming in the past 100,000 years.

B. Chemical changes that naturally occur during the process of decay in only one north Canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found.

C. A little over 103,000 years ago, a large fire is known to have occurred in northern Canada.

D. Strong evidence exists that as early as 70,000 years ago, Homo sapiens around the world relied heavily on fire to cook animals.

E. In the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.
[Reveal] Spoiler: OA

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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 07 Dec 2015, 09:20
IMO 'C' is the answer. Please advise if I am right.

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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 07 Dec 2015, 20:32
How can it be E?

Anyone care to explain?
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#Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 08 Dec 2015, 07:15
I got it wrong and naturally was shocked at the OA.
But then I looked carefully and found E, though little indirect, is the best choice among the 5 choices.

E. In the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

This means, humans used to live in that region for an extensive period of time (atleast 2000 yrs) and they used to hunt and cook, using wood cutting and hunting tools, many species from different biological families. This choice directly talks about the same layer of excavation. No other choice has that merit.

The popular choice C is a clear trap. 2 reasons: A. We can't expect a fire to last for 2000 years. B. Even if the fire exists so long, can we expect the animals to keep on dying for ages? ;)

I originally answered B, which was definitely vague, but POE left me with that.

Pls suggest me if I am going wrong.

Thanks.
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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 18 Jan 2016, 13:31
b9n920 wrote:
I got it wrong and naturally was shocked at the OA.
But then I looked carefully and found E, though little indirect, is the best choice among the 5 choices.

E. In the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

This means, humans used to live in that region for an extensive period of time (atleast 2000 yrs) and they used to hunt and cook, using wood cutting and hunting tools, many species from different biological families. This choice directly talks about the same layer of excavation. No other choice has that merit.

The popular choice C is a clear trap. 2 reasons: A. We can't expect a fire to last for 2000 years. B. Even if the fire exists so long, can we expect the animals to keep on dying for ages? ;)

I originally answered B, which was definitely vague, but POE left me with that.

Pls suggest me if I am going wrong.

Thanks.


That's what I got too for the same reason, but I don't think this is a great question (again, with the "other" source). We have no evidence from E that wood cutting tools were being used to build a fire. Maybe they used it to make spears? Maybe they used it to get bugs out of nests? The ONLY reason I picked E is all the other ones were clearly wrong.
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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 24 Jan 2018, 04:52
b9n920 wrote:
I got it wrong and naturally was shocked at the OA.
But then I looked carefully and found E, though little indirect, is the best choice among the 5 choices.

E. In the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

This means, humans used to live in that region for an extensive period of time (atleast 2000 yrs) and they used to hunt and cook, using wood cutting and hunting tools, many species from different biological families. This choice directly talks about the same layer of excavation. No other choice has that merit.

The popular choice C is a clear trap. 2 reasons: A. We can't expect a fire to last for 2000 years. B. Even if the fire exists so long, can we expect the animals to keep on dying for ages? ;)

I originally answered B, which was definitely vague, but POE left me with that.

Pls suggest me if I am going wrong.


Thanks.




Did they actually use Fire?????Many species from different biological families, Wood, Hunting tools were all found in same place.....but that doesnt cover that they ate those animal after cooking in fire....who knows they ate those animals raw (back those days)...
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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 16 Feb 2018, 07:44
Quote:
1000 degrees Fahrenheit (or 538 degrees Celsius)

we know nothing about the tools found, and even so, can meat reach that temperature while being cooked on fire for eating...?
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Re: #Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 16 Feb 2018, 08:41
So true.. Answer is E according to Gmat standards

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#Top150 CR: On a recent expedition to a remote region of northern [#permalink]

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New post 16 Feb 2018, 23:59
On a recent expedition to a remote region of northern Canada, scientists uncovered skeletal remains from about 100,000 years ago. Surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees Fahrenheit (or 538 degrees Celsius).

Which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures?

A. Other scientific research released two years before the expedition showed that the remote region of northern Canada underwent considerable warming in the past 100,000 years. "Warming" does not explain high temperatures as the reason for the extinction of the species. Incorrect.

B. Chemical changes that naturally occur during the process of decay in only one north Canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. The process of decay in "one" species can not be extrapolated to explain the reason of "all" skeletons of "many" species. Keywords here to focus-"all" & "many". Incorrect.

C. A little over 103,000 years ago, a large fire is known to have occurred in northern Canada. Cannot be used to explain the skeletons of species "spanning about two thousand years". Fire=103,000 years ago; skeleton of species=100,000 +/- 2000 years ago. The puzzle still has missing piece. Incorrect.

D. Strong evidence exists that as early as 70,000 years ago, Homo sapiens around the world relied heavily on fire to cook animals. We are not looking at 70,000 years ago. Incorrect.

E. In the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans. Okay, so this means they needed wood and they were hunters. Can explain why "many" species showed evidence of high temperatures. Again, we wanted information about "many" species, not "all" species. Fits the bill. Correct.
#Top150 CR: On a recent expedition to a remote region of northern   [#permalink] 16 Feb 2018, 23:59
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