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If 10% or more of a planet's total mass is water

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If 10% or more of a planet's total mass is water  [#permalink]

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New post 20 Mar 2019, 23:58
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If 10% or more of a planet's total mass is water, there can be no freshwater environment on that planet as bodies of freshwater are produced by accumulation of natural precipitation on land. A planet without any freshwater environment is unlikely to harbour complex forms of life because they require a good amount of phosphorus to be present in absorbable form in their environment.

Which of the following can be inferred from the information provided above?

A. If 10% or more of a planet's total mass is water, natural precipitation cannot occur on that planet.

B. If 10% or more of a planet's total mass is water, there can be no dry land on that planet.

C. If 10% or more of a planet's total mass is water, there can be little phosphorus on that planet.

D. A planet without any freshwater environment is likely to have simple forms of life in abundance.

E. A planet without any freshwater environment is likely to contain no phosphorus at all.

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Re: If 10% or more of a planet's total mass is water  [#permalink]

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New post 21 Mar 2019, 01:41
Optn. C..... as it can be infered w/o any dispute from the last line of the argument.


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New post 21 Mar 2019, 03:40
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Option C is meant to mislead you through the mention of phosphorus. The problem mentioned in the argument is not the absence of phosphorus in general but the absence of phosphorus in absorbable form.

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Re: If 10% or more of a planet's total mass is water  [#permalink]

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New post 21 Mar 2019, 03:55
Thakurdas wrote:
Option C is meant to mislead you through the mention of phosphorus. The problem mentioned in the argument is not the absence of phosphorus in general but the absence of phosphorus in absorbable form.

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Ok....OA is option B.... pls elaborate why B is the ans...
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Re: If 10% or more of a planet's total mass is water  [#permalink]

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New post 28 Mar 2019, 06:40
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According to the argument given, (1) freshwater is produced when precipitation is accumulated on land and (2) if more than 10% of a planet's total mass is water, there can be no freshwater environment on that planet.

We can establish a connection between the two things mentioned above in only one way 》》If 10% or more of a planet's total mass is water, either no precipitation is possible, or no land (on which the precipitation is to accumulate) rises above water. Option B captures one of these two possibilities.

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New post 28 Mar 2019, 09:19
I can understand by statmnt "If 10% or more of a planet's total mass is water, there can be no freshwater environment on that planet as bodies of freshwater are produced by accumulation of natural precipitation on land". that there is relation b/w "10% or more of a planet's total mass is water" and "accumulation of natural precipitation on land".

But do we really need to know what accumulation of natural precipitation on land is ?

What's the source?


Thakurdas wrote:
According to the argument given, (1) freshwater is produced when precipitation is accumulated on land and (2) if more than 10% of a planet's total mass is water, there can be no freshwater environment on that planet.

We can establish a connection between the two things mentioned above in only one way 》》If 10% or more of a planet's total mass is water, either no precipitation is possible, or no land (on which the precipitation is to accumulate) rises above water. Option B captures one of these two possibilities.

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New post 28 Mar 2019, 22:22
i marked my answer as c, i was able to easily eliminate D,E and A but not sure how can i arrive at b ? Please explain
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Re: If 10% or more of a planet's total mass is water  [#permalink]

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New post 29 Mar 2019, 05:27
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Pranithare wrote:
i marked my answer as c, i was able to easily eliminate D,E and A but not sure how can i arrive at b ? Please explain

A key aspect of correct answering Critical Reasoning questions is noticing details.

In this case, in order to eliminate C, you have to notice the detail that the passage does not say that phosphorus is not available on the planets described. It says that the life forms require "phosphorus to be present in absorbable form," a statement that does not indicate that phosphorus is not present, only that it is not present in absorbable form.

So, C, which says that "there can be little phosphorus," is not supported.

B, however, is supported, because the passage says,"If 10% or more of a planet's total mass is water, there can be no freshwater environment on that planet as bodies of freshwater are produced by accumulation of natural precipitation on land."

If the reason that there is no fresh water is that there has to be land in order for fresh water to be present, it seems that there is no dry land, as B says.

Granted, it may be possible that there is a tiny bit of dry land, but not enough land to support the accumulation of fresh water. At the same time, since none of the other choices follow from what the passage says, and B basically does, we can choose B.
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New post 29 Mar 2019, 08:49
Please help me to understand why choice A is wrong. According to my understanding, if natural precipitation does not occur then there is no dry land which is same as mentioned in the option B.
Then y we are choosing option B instead of A

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New post 29 Mar 2019, 17:47
Even I have same question, i have also selected A. Can someone please help with this?

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New post 29 Mar 2019, 18:17
gaurav2m wrote:
Please help me to understand why choice A is wrong. According to my understanding, if natural precipitation does not occur then there is no dry land which is same as mentioned in the option B.
Then y we are choosing option B instead of A

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Correctly answering this CR question requires noticing some key details. One such detail appears in the first sentence of the passage.

Here is that sentence:

If 10% or more of a planet's total mass is water, there can be no freshwater environment on that planet as bodies of freshwater are produced by accumulation of natural precipitation on land.

Does that sentence say or imply that, if 10% or more of a planet's total mass is water, there will be no precipitation?

No.

It implies that, if 10% or more of a planet's total mass is water, there will be no accumulation of precipitation on land. There could still be precipitation on that planet.

Here's what (A) says:

A. If 10% or more of a planet's total mass is water, natural precipitation cannot occur on that planet.

(A) is a classic CR trap answer, because, although it is not supported by what the passage says, since it uses words that the passage uses, it may seem to match what the passage says.

GMAT CR is not a word matching game. To get CR questions correct consistently, you have to be very careful and use tight logic.
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Re: If 10% or more of a planet's total mass is water  [#permalink]

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New post 20 May 2019, 04:16
Thakurdas wrote:
According to the argument given, (1) freshwater is produced when precipitation is accumulated on land and (2) if more than 10% of a planet's total mass is water, there can be no freshwater environment on that planet.

We can establish a connection between the two things mentioned above in only one way 》》If 10% or more of a planet's total mass is water, either no precipitation is possible, or no land (on which the precipitation is to accumulate) rises above water. Option B captures one of these two possibilities.

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Hi,
Of the two possibilities that you've mentioned, the first is option A and the second is option B. So..?
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New post 21 May 2019, 04:59
Thakurdas wrote:
If 10% or more of a planet's total mass is water, there can be no freshwater environment on that planet as bodies of freshwater are produced by accumulation of natural precipitation on land. A planet without any freshwater environment is unlikely to harbour complex forms of life because they require a good amount of phosphorus to be present in absorbable form in their environment.

Which of the following can be inferred from the information provided above?

A. If 10% or more of a planet's total mass is water, natural precipitation cannot occur on that planet- Passage mentions natural precipitation occurs on land to create freshwater environment but it doesn't mean it cannot occur water bodies itself. The only difference is freshwater won't occur on that planet.

B. If 10% or more of a planet's total mass is water, there can be no dry land on that planet-its bit difficult to understand but its better than other options, which signifies there is no land to occur natural precipitation.Therefore, no freshwater environment is available on that planet.

C. If 10% or more of a planet's total mass is water, there can be little phosphorus on that plane- In what form phosphorus is available.its a trap.

D. A planet without any freshwater environment is likely to have simple forms of life in abundance.-Maybe or may be not we cannot infer it

E. A planet without any freshwater environment is likely to contain no phosphorus at all.In what form phosphorus is not available and what form it is available.its a trap.

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Re: If 10% or more of a planet's total mass is water   [#permalink] 21 May 2019, 04:59
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