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#Top150 CR: Botanist: On the remote island of Tropica it is known

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#Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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01 Jan 2016, 01:13
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95% (hard)

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49% (01:58) correct 51% (02:12) wrong based on 422 sessions

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Botanist: On the remote island of Tropica, it is known that early settlers brought a special variety of sunflower plant to cultivate on their arrival over 10,000 years ago. All of the sunflowers on the island today, both wild and farmed, have descended from that original variety. By studying today’s wild sunflower plants on the island of Tropica, we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have.

The botanist’s argument depends on which of the following assumptions?

(A) There were not other varieties of sunflowers on Tropica when the settlers first arrived on the island.

(B) The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.

(C) The climate on the island of Tropica has not changed significantly over the past 10,000 years.

(D) The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.

(E) Some wild plants have mutated dramatically over the past 10,000 years.

The botanist’s argument makes one very important (but easily overlooked) assumption: over the past 10,000 years, wild sunflowers have remained more similar to the original variety than the selectively cultivated farmed sunflowers have. What if wild sunflowers have evolved dramatically but the selective cultivation has produced very few changes from the original variety? In the original argument it is easy to assume that selectively cultivated = more changes but that is not necessarily the case. Answer choice (B) removes this possibility by guaranteeing that indeed the wild plants are more similar and thus improves the botanist’s argument. (A) is irrelevant because you are told in the argument that all of the sunflowers on the island today have descended from the one variety brought by the settlers. (C) is incorrect because you do not know how a change in climate might have affected the sunflowers. Maybe the change caused major mutations in the wild sunflowers but maybe not. (D) weakens the argument by suggesting that the changes in farmed plants were not significant (the argument assumes that they were) . (E), with the word “some”, is problematic because it might only refer to one plant, but even if did refer to many, this statement would also weaken the argument.

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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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01 Jan 2016, 11:57
The conclusion is: "By studying today’s wild sunflower plants on the island of Tropica, we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have."

A. There were not other varieties of sunflowers on Tropica when the settlers first arrived on the island.
-->If there is other sun flower varieties, then studying those wild ones today will not help to understand the original variety.

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.
--> Irrelevant

C. The climate on the island of Tropica has not changed significantly over the past 10,000 years.
-->Irrelevant, there is no mention about the weather in the paragraph or the effect of weather on studying sun flowers

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.
-->If there are just few changes, may be studying farmed flowers is also good. Against the conclusion.

E. Some wild plants have mutated dramatically over the past 10,000 years.
-->Against the conclusion.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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01 Jan 2016, 21:01
agree on A.
B is something that can be inferred from the argument. this is an assumption type of question, thus B cannot be the answer.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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01 Jan 2016, 21:29
Botanist: On the remote island of Tropica, it is known that early settlers brought a special variety of sunflower plant to cultivate on their arrival over 10,000 years ago. All of the sunflowers on the island today, both wild and farmed, have descended from that original variety. By studying today’s wild sunflower plants on the island of Tropica, we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have.

Premise 1---> early settlers brought a special variety of sunflower plant to cultivate on their arrival over 10,000 years ago.

Premise 2--->All of the sunflowers on the island today, both wild and farmed, have descended from that original variety.

By studying today’s wild sunflower plants on the island of Tropica,---> we can have insight of original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have. ( Conclusion) or opinion forwarded by the argument.

Pre-thinking: Cultivation of sunflower can bring changes in comparison with the original variety.

Option B says that The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.

Option D says that the farmed sunflower has experienced some changes

It should be our assumption that relates to the argument.

Thanks,

Sun01
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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02 Jan 2016, 01:42
mvictor wrote:
agree on A.
B is something that can be inferred from the argument. this is an assumption type of question, thus B cannot be the answer.

Hi mvictor

A cannot be the assumption because its already stated in the premise that 'All of the sunflowers on the island today, both wild and farmed, have descended from that original variety.'
If u negate B, it breaks the conclusion about using the wild sunflower to learn about the original variety of sunflowers.

Thanks!
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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05 Jan 2016, 01:40
Completely confused between B and D
Negating both kind of weakens the argument.

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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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05 Jan 2016, 02:02
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kanigmat011 wrote:
Completely confused between B and D
Negating both kind of weakens the argument.

Hi,
lets see the choices..

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.
It clearly is the assumption on which the botanist wants teh wild sunflower to be studied...
clearly the assumption to prefer wild over farmed sunflower..

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.
This tells us that there could be very few significant changes and possibly no changes in farmed crop..
This assumption would go against not studying the farmed crop, after all they too have undergone very few changes, which too may not be true..
so no reason to prefer wild over farmed, or to completely neglect farmed crop

hope it helps
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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05 Jan 2016, 05:55
IMO B

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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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05 Jan 2016, 09:49
chetan2u wrote:
kanigmat011 wrote:
Completely confused between B and D
Negating both kind of weakens the argument.

Hi,
lets see the choices..

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.
It clearly is the assumption on which the botanist wants teh wild sunflower to be studied...
clearly the assumption to prefer wild over farmed sunflower..

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.
This tells us that there could be very few significant changes and possibly no changes in farmed crop..
This assumption would go against not studying the farmed crop, after all they too have undergone very few changes, which too may not be true..
so no reason to prefer wild over farmed, or to completely neglect farmed crop

hope it helps

Hi Chetan,

Thanks again for helping me out.
yes Now B seems better choice to me in terms of argument

But I feel this negation strategy doesn't work always.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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05 Jan 2016, 10:46
B. If the farmed sunflowers are more similar to the original sunflower than the wild sunflowers, there's no point in studying the wild to learn about the original.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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12 Jan 2016, 06:44
chetan2u wrote:
kanigmat011 wrote:
Completely confused between B and D
Negating both kind of weakens the argument.

Hi,
lets see the choices..

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.
It clearly is the assumption on which the botanist wants teh wild sunflower to be studied...
clearly the assumption to prefer wild over farmed sunflower..

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.
This tells us that there could be very few significant changes and possibly no changes in farmed crop..
This assumption would go against not studying the farmed crop, after all they too have undergone very few changes, which too may not be true..
so no reason to prefer wild over farmed, or to completely neglect farmed crop

hope it helps

Hi chetan2u,

One more reson to eliminate Option D is--> if we read closely.

Stimilus-
we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have

Option D- The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.

Doesn't these two statements are contradicting...??

Thanks and Regards,
Prakhar
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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12 Jan 2016, 11:14
kanigmat011 wrote:
But I feel this negation strategy doesn't work always.

Hi kanigmat011

I think that's not possible. Negation strategy is like mathematics. It has to work, if the argument is 'good'.

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.

negate D: The selective cultivation of farmed plants over the past 10,000 years has led to significant changes from the original variety

- this is inline with the argument, right? But a real assumption on negation should shatter the conclusion. So, D is not an assumption.

I hope it helps.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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16 Mar 2016, 02:57
A tricky deviates from conclusion

Conclusion: We can learn much more about that original variety of sunflower

so, we do not need other varieties

B fills logical jump between Premise and Conclusion

Premise just say that not cultivated species is better than cultivated. Assumption is B saying that

"The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants"

C is out of scope

D and E weakens the conclusion, so cannot be assumption

B is correct
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known  [#permalink]

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03 Apr 2018, 09:06
premise: settlers planted special variety of sunflower 10000 yr ago. all sunflower on island are from that variety.
conclusion: by studying today's variety, we can know about that orginal variety.
evidence: the wild plants have not been selectively cultivated over the years as the farmed plants have.

Pre-thinking: what if selectively not cultivated, then we would have lost the original variety some where in between. now that we have cultivated then properties of orginal one are carried on in current variety.

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants. --- what if this is not true. what good it will bring by studying these plants. we will know nothing about orginal variety. straight thi is the right answer.

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety. --- even if few changes we can know about the original variety. what if we negate it. conclusion is as it is. this can't be the answer.
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Re: #Top150 CR: Botanist: On the remote island of Tropica it is known &nbs [#permalink] 03 Apr 2018, 09:06
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