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Rain-soaked soil contains less oxygen than does drier soil.

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Rain-soaked soil contains less oxygen than does drier soil. [#permalink] New post 21 Jan 2017, 08:04
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56% (01:59) correct 43% (01:16) wrong based on 39 sessions


Rain-soaked soil contains less oxygen than does drier soil.The roots of melon plants perform less efficiently under the low-oxygen conditions present in rain soaked soil.When the efficiency of melon roots is impaired, the roots do not supply sufficient amounts of the proper nutrients for the plants to perform photosynthesis at their usual levels. It follows that melon plants have a lower-than-usual rate of photosynthesis when their roots are in rain-soaked soil . When the photosynthesis of the plants slows, sugar stored in the fruits is drawn off to supply the plants with energy. Therefore, ripe melons harvested after a prolonged period of heavy rain should be less sweet than other ripe melons.

In the argument given, the two highlighted portions play which of the following roles?

A) The first states the conclusion of the argument as a whole; the second provides support for that conclusion.
B) The first provides support for the conclusion of the argument as a whole; the second provides evidence that supports an objection to that conclusion.
C) The first provides support for an intermediate conclusion that supports a further conclusion stated in the argument; the second states that intermediate conclusion.
D) The first serves as an intermediate conclusion that supports a further conclusion stated in the argument; the second states the position that the argument as a whole opposes.
E) The first states the position that the argument as a whole opposes; the second supports the conclusion of the argument.
[Reveal] Spoiler: OA

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Re: Rain-soaked soil contains less oxygen than does drier soil. [#permalink] New post 21 Jan 2017, 08:11
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Explanation

The first bold sentence is a fact. The second one is a conclusion that follows the first part. So C is the best combination.
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Re: Rain-soaked soil contains less oxygen than does drier soil. [#permalink] New post 12 Apr 2018, 11:55
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Let's set up this whole passage as a formal argument. We can do this through logic, or key words like it follows that and therefore. I've put numbers on repeating ideas that we should watch for:

Given:
1. [Rain-soaked soil^5] contains [less oxygen^1] than does drier soil.
2. The roots of melon plants perform [less efficiently^2] under the [low-oxygen conditions^1] present in [rain soaked soil^5].
3. When the [efficiency of melon roots is impaired^2], the roots do not supply sufficient amounts of the proper nutrients for the plants to perform [photosynthesis at their usual levels^3].

Therefore:
1. Melon plants have a [lower-than-usual rate of photosynthesis^3] when their roots are in [rain-soaked soil^5].

And given that:
1. When the [photosynthesis of the plants slows^3], [sugar stored in the fruits^4] is drawn off to supply the plants with energy.

Therefore:
1. Ripe melons harvested after a prolonged period of [heavy rain^5] should be [less sweet^4] than other ripe melons.

This, of course, is overkill. Really we could just rely on key words, and assume the rest based on the order of the paragraph (first bold is in facts before "it follows that", second bold is after "it follows that". "It follows that" is before "therefore").

But, it's good practice.
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Re: Rain-soaked soil contains less oxygen than does drier soil. [#permalink] New post 13 May 2018, 19:05
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Option C

Main Conclusion - Ripe Melons harvested.....should be less Sweet ; so the 1st Option is rejected as the 1st Bold part is not at all the conclusion

There is no Opposition or Objection Present in the Passage , So Reject Options B & D & E

So answer is C .
Re: Rain-soaked soil contains less oxygen than does drier soil.   [#permalink] 13 May 2018, 19:05
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Rain-soaked soil contains less oxygen than does drier soil.

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