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Like animals, trees need a steady supply of water in order to survive.

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Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 17 Jul 2018, 21:49
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Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

Which of the following, if true, would explain the paradox above?


A. The roots of Sequoia sempervirens extend deeper and more broadly than the roots of other species, making them less likely to fall than other trees.

B. Sequoia sempervirens tend to grow primarily in areas that are not susceptible to long periods without rainfall.

C. Sequoia sempervirens are among the tallest trees in the world, providing access to regular direct sunlight even in crowded forests.

D. Many trees, including Sequoia sempervirens, are vulnerable to tipping over via wind when their bases become unstable

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves.

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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 17 Jul 2018, 22:07
OA: E

Premise : Trees need a steady supply of water in order to survive.When forests go for periods of several months without rainfall, many trees die from lack of hydration.
Paradox : forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

To resolve the paradox, correct option should have an altenate way in which Sequoia sempervirens can get water from source other than rain.
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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 17 Jul 2018, 22:10
Bunuel wrote:
Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

Which of the following, if true, would explain the paradox above?


A. The roots of Sequoia sempervirens extend deeper and more broadly than the roots of other species, making them less likely to fall than other trees.

B. Sequoia sempervirens tend to grow primarily in areas that are not susceptible to long periods without rainfall.

C. Sequoia sempervirens are among the tallest trees in the world, providing access to regular direct sunlight even in crowded forests.

D. Many trees, including Sequoia sempervirens, are vulnerable to tipping over via wind when their bases become unstable

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves.


Question Type: Resolve the Paradox

Premise 1: Trees need a steady supply of water to survive. Trees in forests that have no rainfall for several months, die due to lack of hydration.

Premise 2: Forests that primarily have Sequoia trees, don't see a significant decline in the number of living trees, even when there is no rainfall for several months.

Analysis: Since premise 1 states. all trees require water for for survival, that includes sequoia trees. If forests with Sequoia trees don't see a decline, when there is no rainfall for several months, then Sequoia trees must be obtaining water from some other source than rainfall.

Only Answer E, provides a new process for obtaining water.


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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 18 Jul 2018, 01:49
Bunuel wrote:
Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.


+1 for E.

Pre-thinking :
Though many trees die from lack of hydration when forests go for periods of several months without rainfall, forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees. Therefore, there might be an alternate source of water absorption for these trees to survive.

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves. --> Correct, matches our pre-thinking

Hence, E.
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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 18 Jul 2018, 01:53
Sequoia trees are tallest where do I find that? Bt in general trees can survive in adverse condition if the option A holds true!
So Ans is option “A”

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Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 18 Jul 2018, 03:05
debubhb wrote:
Sequoia trees are tallest where do I find that? Bt in general trees can survive in adverse condition if the option A holds true!
So Ans is option “A”

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Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

Type- Paradox


A. The roots of Sequoia sempervirens extend deeper and more broadly than the roots of other species, making them less likely to fall than other trees.- Incorrect - But this does NOT answer why Sequoia sempervirens survive for several months without rainfall and not see a significant decline in the number of living trees.

B. Sequoia sempervirens tend to grow primarily in areas that are not susceptible to long periods without rainfall. - Incorrect - but this does not explain why does tree survive when there is no rain for long periods.

C. Sequoia sempervirens are among the tallest trees in the world, providing access to regular direct sunlight even in crowded forests. - Irrelevant

D. Many trees, including Sequoia sempervirens, are vulnerable to tipping over via wind when their bases become unstable - Irrelevant

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves.- Correct - even during draught these trees absorb moisture from the air through their leaves.

Answer E

debubhb , the correct answer here is option E
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Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 18 Jul 2018, 09:41
Bunuel wrote:
Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

Which of the following, if true, would explain the paradox above?


A. The roots of Sequoia sempervirens extend deeper and more broadly than the roots of other species, making them less likely to fall than other trees.

B. Sequoia sempervirens tend to grow primarily in areas that are not susceptible to long periods without rainfall.

C. Sequoia sempervirens are among the tallest trees in the world, providing access to regular direct sunlight even in crowded forests.

D. Many trees, including Sequoia sempervirens, are vulnerable to tipping over via wind when their bases become unstable

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves.


It's E. We need some other reason which proves what SS can do other trees can't. E says the same. If other trees could do the same they would not fall. So E is correct.
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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 20 Jul 2018, 08:13
Skywalker18, thanks for your reply.
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Re: Like animals, trees need a steady supply of water in order to survive.  [#permalink]

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New post 22 Jul 2018, 09:14
Bunuel wrote:
Like animals, trees need a steady supply of water in order to survive. When forests go for periods of several months without rainfall, many trees die from lack of hydration. However forests that are primarily populated by Sequoia sempervirens can go for several months without rainfall and not see a significant decline in the number of living trees.

Which of the following, if true, would explain the paradox above?


A. The roots of Sequoia sempervirens extend deeper and more broadly than the roots of other species, making them less likely to fall than other trees.

B. Sequoia sempervirens tend to grow primarily in areas that are not susceptible to long periods without rainfall.

C. Sequoia sempervirens are among the tallest trees in the world, providing access to regular direct sunlight even in crowded forests.

D. Many trees, including Sequoia sempervirens, are vulnerable to tipping over via wind when their bases become unstable

E. As some of the tallest trees in the world, Sequoia sempervirens evolved to absorb moisture from the air through their leaves.


VERITAS PREP OFFICIAL SOLUTION:



In this Explain the Paradox question, your job is to connect two seemingly paradoxical facts: generally when forests go months without rainfall, many trees in that forest die, but forests that are primarily Sequoia sempervirens don't see that same phenomenon. So you need to find a reason why Sequoia sempervirens are different.

A clue can be found in the first sentence of the stimulus: the reason that many trees die without sufficient rainfall is that trees need a steady supply of water to survive. So one type of answer to anticipate is one that supplies a water supply that doesn't require rainfall: what if their roots ran in to riverbanks, or their forests were all located within federally-maintained parks, for example? Choice (E) supplies such a reason: Sequoia sempervirens can absorb moisture from the air, so they can get their water supply even when it doesn't rain. Choice (E) is therefore correct.

Among the other answer choices, note that (A) and (D) are each outside the scope of the argument, which is about trees dying from lack of rainfall - (A) and (D) talk about reasons that Sequoia sempervirens wouldn't die from tipping over, but that's not what the argument is about.

(C) is similar, providing a reason that Sequoia sempervirens wouldn't die from lack of sunlight, but again that's not the cause-of-death in question as this argument is only talking about why it's surprising that Sequoia sempervirens wouldn't die from lack of rainfall.

Choice (D) is incorrect because the given facts already state that they're talking about the cases when Sequoia sempervirens forests do suffer from lack of rainfall. (D) says that that's a limited occurrence, but the given information already accounts for that by limiting to the handful of cases when these forests do not see rain for several months.
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Resources:
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: Like animals, trees need a steady supply of water in order to survive. &nbs [#permalink] 22 Jul 2018, 09:14
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