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Several years ago, the number of wood bison became so low that conserv

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Several years ago, the number of wood bison became so low that conserv [#permalink]

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New post 15 Jan 2018, 04:50
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Several years ago, the number of wood bison became so low that conservationists began breeding the wood bison in an enclosed refuge. In this time, the number of wood bison has tripled and, according to conservationists, this number is enough for a species to remain viable in the wild. Yet since the wood bison’s habitat is still imperiled, conservationists plan to move the wood bison 2,000 miles away, where the American buffalo, a distinct species, flourishes. The conservationists predict that such a plan will allow for the long-term viability of the wood bison as a species.

Which of the following, if true, calls into question the conservationist’s prediction?

A The American buffalo and the wood bison can thrive off of the same resources.

B No wood bison has ever been within 1,000 miles of the area in which the conservationists are planning to move the herd.

C The American buffalo and the wood bison readily mingle, and, in the past, this has lead the two species to mix so that the number of actual wood bison declines steadily.

D American buffalo once shared territory with the wood bison, but the American buffalo’s territory slowly moved south so that now the

E American buffalo no longer inhabits the same area as the wood bison.
Not all of the predators that hunt the wood bison hunt the American buffalo.
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Re: Several years ago, the number of wood bison became so low that conserv [#permalink]

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New post 15 Jan 2018, 10:20
chesstitans wrote:
Several years ago, the number of wood bison became so low that conservationists began breeding the wood bison in an enclosed refuge. In this time, the number of wood bison has tripled and, according to conservationists, this number is enough for a species to remain viable in the wild. Yet since the wood bison’s habitat is still imperiled, conservationists plan to move the wood bison 2,000 miles away, where the American buffalo, a distinct species, flourishes. The conservationists predict that such a plan will allow for the long-term viability of the wood bison as a species.

Which of the following, if true, calls into question the conservationist’s prediction?

A The American buffalo and the wood bison can thrive off of the same resources.

B No wood bison has ever been within 1,000 miles of the area in which the conservationists are planning to move the herd.

C The American buffalo and the wood bison readily mingle, and, in the past, this has lead the two species to mix so that the number of actual wood bison declines steadily.

D American buffalo once shared territory with the wood bison, but the American buffalo’s territory slowly moved south so that now the
American buffalo no longer inhabits the same area as the wood bison.
E Not all of the predators that hunt the wood bison hunt the American buffalo.


Only Option C talk decrease in wood bison.
A - Strengthens
B - Talks about 2000 miles away to out of scope
D - Talks about American buffalo
E - Out of scope. Also slightly strengthens the stem.
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Re: Several years ago, the number of wood bison became so low that conserv [#permalink]

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New post 18 Jan 2018, 10:19
Yes c only explains the weakening...

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Re: Several years ago, the number of wood bison became so low that conserv [#permalink]

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New post 18 Jan 2018, 11:14
First of all, answer choices (D) and (E) are written wrong. This is the accurate question:

Several years ago, the number of wood bison became so low that conservationists began breeding the wood bison in an enclosed refuge. In this time, the number of wood bison has tripled and, according to conservationists, this number is enough for a species to remain viable in the wild. Yet since the wood bisons habitat is still imperiled, conservationists plan to move the wood bison 2,000 miles away, where the American buffalo, a distinct species, flourishes. The conservationists predict that such a plan will allow for the long-term viability of the wood bison as a species.

Which of the following, if true, calls into question the conservationists prediction?

A) The American buffalo and the wood bison can thrive off of the same resources.
B) No wood bison has ever been within 1,000 miles of the area in which the conservationists are planning to move the herd.
C) The American buffalo and the wood bison readily mingle, and, in the past, this has lead the two species to mix so that the number of actual wood bison declines steadily.
D) American buffalo once shared territory with the wood bison, but the American buffalo’s territory slowly moved south so that now the American buffalo no longer inhabits the same area as the wood bison.
E) Not all of the predators that hunt the wood bison hunt the American buffalo.

The answer is C.




As is usually the case, there is more than one way to solve:

A precise solution can be found on focusing on what we are looking for: something that will call into question the prediction that putting the wood bison where the buffalo are will cause them to flourish - in other words, something that suggests that putting them together will lower the bison's chances of survival. Maybe the buffalo hurt them? Or something about the interaction between the two produces less bison? Now that we know what we are looking for, we'll look at the answers - this is exactly what C suggests: mingling will buffalo will make the number of bison drop

Solving by using the answers:

A) The American buffalo and the wood bison can thrive off of the same resources. This strengthens the prediction - it suggests that what is god for the buffalo, will be good for the bison
B) No wood bison has ever been within 1,000 miles of the area in which the conservationists are planning to move the herd. This isn't surprising - the whole point is they are being moved to a new place - but it doesn't help strengthen or weaken the prediction.
C) The American buffalo and the wood bison readily mingle, and, in the past, this has lead the two species to mix so that the number of actual wood bison declines steadily. There you have it: mingling may cause the number of wood bison to decrease, contradicting the prediction.
D) American buffalo once shared territory with the wood bison, but the American buffalo’s ' territory slowly moved south so that now the American buffalo no longer inhabits the same area as the wood bison. We already knew they don't live in the same place today - this doesn't help us figure what will happen if they are put together
E) Not all of the predators that hunt the wood bison hunt the American buffalo. Doesn't help either way
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Re: Several years ago, the number of wood bison became so low that conserv   [#permalink] 18 Jan 2018, 11:14
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