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Q40: Two centuries ago, Tufe Peninsula became separated form

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Re: Two centuries ago, Tufe Peninsula became separated form the [#permalink]

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New post 28 Mar 2016, 00:29
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. - Irrelevant
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. - Irrelevant
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. - If we negate this, then that means that the mainland's environment has changed and hence is the reason for difference in length. This is a blow on the conclusion which states that the change in TUFE'S environment is the reason for the difference in height.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. - This could be a possible explanation of the situation, but does not strengthen the author's conclusion - that environmental conditions on Tufe are a reason for difference in length. Hence this cannot be the assumption that the author made.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations. - Irrelevant

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 03 Apr 2016, 03:43
jet1445 wrote:
Q40:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.


So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Was that cocnlusion striclty about Tufe ISland? So the mainland is not Tufe as well? Bcos the conclusion didnt say Tufe Island. I guess the answer is yes cos the mainland wasnt named at all.

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 13 May 2016, 22:13
I think the question situation needs to be improved...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

should change to...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe island's environmental conditions.

Option C would then be more appropriate. Both the peninsula and the island are called "Tufe", so as it stands right now, even if you negative option C (mainland's environment HAS changed positively), you can still say that the changes in height are attributable to "changes in environment of Tufe (mainland)"...

What do you think egmat ?

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 27 May 2016, 22:14
Hello,

Isn't this should be specific in the question, Tufe Island's Environmental conditions rather than Tufe's Environmental Conditions.

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 27 May 2016, 22:17
[quote="TDK82"]I think the question situation needs to be improved...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

should change to...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe island's environmental conditions.

Option C would then be more appropriate. Both the peninsula and the island are called "Tufe", so as it stands right now, even if you negative option C (mainland's environment HAS changed positively), you can still say that the changes in height are attributable to "changes in environment of Tufe (mainland)"...




I think the same.

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Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 29 May 2016, 06:23
A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. -- We're only concerned about Turfil sunflowers.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. -- The number of sunflowers is irrelevant.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. -- Correct assumption. No other cause could lead to the same effect. Also, negating this breaks the conclusion.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. -- The type of nutrients responsible for the 40-cm additional growth are out of scope.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations. -- We are not interested in any other differentiating factors.

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 01 Sep 2016, 01:16
Agree with comments above - the argument has to mention Island/Mainland in the conclusions, otherwise, even if C is negated, that doesn't ruin the argument since it's about the changes in the environment. Though, POE helps - no other choice stands closer to C, therefore C is the best option.

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Re: Two centuries ago, Tufe Peninsula became separated form the [#permalink]

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New post 01 Oct 2016, 14:06
does option C mean : its actually the plant in tufe peninsula that grows and plant in tufe island does not change and thats why the difference in height??

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Re: Two centuries ago, Tufe Peninsula became separated form the [#permalink]

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New post 06 Oct 2016, 07:46
C for me.

Equations made after reading the argument:
Height of TSP lesser than Height of TSM
Climate condition at P drier than Climate condition at M
=> Climate impacts TSP.

Therefore assumption should be taken at facevalue of the argumanet, assumption should be a regarding climate and TSP/TSM

Only B fits.

NOTE:
TSM: Tufe Sunflower at MAinland
TSM: Tufe Sunflower at Peninsulat
M: Mainland
P: Peninsula

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Two centuries ago, Tufe Peninsula became separated form the [#permalink]

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deepak268 wrote:
does option C mean : its actually the plant in tufe peninsula that grows and plant in tufe island does not change and thats why the difference in height??


No, actually the other way round. The island plants grow 40 cm less than the mainland plants. However the point is not which group grows more - it is the difference in growth that matters:

There are 3 environmental conditions discussed here:

1. Past: the environmental condition of the mainland (the island was a part of the mainland then).
2. Present: the environmental condition of the mainland.
3. Present: the environmental condition of the island.

The argument is:
Present: the plan height on island is different from plant height on main land ( the plants under conditions 2 and 3 are different).
However the reason for this difference is stated as the difference between 1 and 3 ( NOT 2 and 3!)... "Tufe Island is significantly drier than Tufe Peninsula WAS". So it is assumed that condition 2 has not changed in the same way as condition 3.

Another approach (negation):

The mainland’s environment has not changed. Thus the conditions 2 and 3 are same now, so there is no environmental reason that the heights would be different. Thus the argument breaks down.

Option C is hence correct.

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Re: Two centuries ago, Tufe Peninsula became separated form the mainland, [#permalink]

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With assumption Q's, remember to negate:

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
"There are types of vegetation that are known to benefit from dry conditions". Out of scope -- we don't care about other types of vegetation
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
"There were not as many Turfil sunflowers on Peninsula 2 centuries ago as today". Out of scope, this doesnt address weather or any case that would make it true
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
"The mainland's environment HAS CHANGED in ways that resulted in T sunflowers on the mainland growing 40cm taller than 2 centuries ago". OK, so you're telling me before T Peninsula separated, both sunflowers were "X" height, then when the separation of the island finalized, the ENVIRONMENT CHANGED, allowing the sunflowers to grow? This would mean the sunflowers are "X+40cm" on the mainland!
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
"The soil on Island, like that on the mainland, lacks important nutrients". This draws a SIMILARITY between the island and the mainland when comparing SOIL. However, we're curious to know about changed in the ENVIRONMENT and how the two geographies are DIFFERENT.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.
"40-cm height difference between T sunflowers on island and those on mainland is NOT the only difference." Out of scope. So what if it is? Only difference we care about is environmental factors that cause an increase in height

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Re: Two centuries ago, Tufe Peninsula became separated form the mainland, [#permalink]

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New post 04 Apr 2017, 20:32
i did not get the question.. can you explaib

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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 18 Sep 2017, 16:58
Ashitha

Can you please elaborate what did you not understand in this question?
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Re: Q40: Two centuries ago, Tufe Peninsula became separated form [#permalink]

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New post 19 Sep 2017, 08:50
jet1445 wrote:
Q40:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.



I got the answer wrong. Here is my understanding of this question -

There are two parts - Tufe Island(TI) and Tufe Mainland(TM)

Premise : TI sunflowers are on an average 40cm shorter than the TM sunflowers. And TI is drier than TM.

Conclusion: Current average height of Tufe’s(TI) Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.


A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. [ we are not interested what is happening to other vegetations - Out of Scope]
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. [ The number of SF is not important to us, their height is]
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. [This tells us the height of TM Sunflowers has not changed because the environment is same. If this is correct, then the sunflowers in TM have the same height and sunflowers in TI could be smaller because of dryness] [Negation test can also be used to test this - I didn't check silly me!] :(
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. [This would give alternate reasons for the lack of growth in height and weaken the authors conclusion, so this can't be our answer]
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.[I chose this, but this cannot be the correct answer, let's negate this and assume that even if there is some other difference between the two populations, how does that help us in concluding that difference is because of the environment difference? It doesn't hence this is incorrect]


Would be glad if someone can verify these. :)


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Re: Q40: Two centuries ago, Tufe Peninsula became separated form   [#permalink] 19 Sep 2017, 08:50

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