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why not A

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why not A

by Onell » Sun Jan 16, 2011 8:06 pm
Millions of identical copies of a plant can be produced using new tissue-culture and cloning techniques.
If plant propagation by such methods in laboratories proves economical, each of the following, if true, represents a benefit of the new techniques to farmers EXCEPT:
(A) The techniques allow the development of superior strains to take place more rapidly, requiring fewer generations of plants grown to maturity.
(B) It is less difficult to care for plants that will grow at rates that do not vary widely.
(C) Plant diseases and pests, once they take hold, spread more rapidly among genetically
uniform plants than among those with genetic variations. (D) Mechanical harvesting of crops is less difficult if plants are more uniform in size.
(E) Special genetic traits can more easily be introduced into plant strains with the use of the new
techniques.
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by prachich1987 » Mon Jan 17, 2011 12:14 am
Please advise source of the question.
It is very important for everone to know the source of the question.
Please read below a message from one of the MGMAT expert "Whitney Garner"
Quote:
1) If you don't know the source, then you don't know whether you are compromising your future practice tests. What if the question is from the practice test you're about to take and now you see a question that you've already seen before? When that happens, it can blow the validity of your whole test! (Not if it happens just once, of course, but what if it happens multiple times?)

2) If you're taking a practice test and do see a question you've seen before, you'll probably answer it more quickly. This will give you a false sense of timing security because you now have a little more time... but that situation will NEVER be replicated on the real test.

3) The source might be bad. Do you want to study from a bad source? I don't!
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by AIM GMAT » Mon Jan 17, 2011 12:32 am
Well after elimination we are left with A and C. Now both are bad after effects of implementation of new techniques , but the argument is asking what ? Its asking which one is NOT THE benefit to farmer .

A] It tells us that only few generations will reach to maturation . Does this harm farmer in any way ?

C] This option tells us that diseases will have a better hold on genetically uniform plants , so farmer might face some harm . This the option we need .Correct.

Hope this helps.

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AIM GMAT
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by Adam@Knewton » Mon Jan 17, 2011 1:23 pm
I'll answer your question in two ways:

First, why A? In an "EXCEPT" question we shouldn't expect 4 spectacular answers, so pretty much anything that could in theory help farmers will be eliminated here. A says that we can grow superior plants in fewer generations -- this sounds good, if we're a wheat farmer or something. It's not the greatest most obvious benefit in the world, but who cares? It's enough to eliminate on an EXCEPT question.

Second, why not C? C clearly states that there's a major negative effect to farmers. C has to be the right answer. Even in the most critical case, if you're unsure about A, remember that if it's not wrong, it's right -- meaning that C has to be right and you shouldn't spend time on test day overanalyzing the other four choices.
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