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Certain genetically modified strains of maize produce a

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Director
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G
Joined: 02 Sep 2016
Posts: 778

Kudos [?]: 41 [0], given: 267

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Re: Certain genetically modified strains of maize produce a [#permalink]

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New post 27 Dec 2016, 06:35
Straight C.

If monarch butterflies are not ACTIVELY FEEDING during the time maize releases pollen then they won't feed on pollen and thus won't die.

Thus weakening the argument.
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Re: Certain genetically modified strains of maize produce a [#permalink]

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New post 13 Jul 2017, 17:58
The crux of this argument is that genetically modified maize kills the caterpillars which eat the leaves dusted with poisonous pollen.

The only answer that works in our favor to decide if genetically modified maize will hurt the caterpillars is to find out if the leaves are harmful during the butterfly spawning season. Answer C will help us. If we find out that yes, the caterpillars feed when the pollen release is at its peak, we can conclude that g-mod maize is hazardous to monarch butterflies. If not, it does not cause the caterpillars as much harm as the statement claims.
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Re: Certain genetically modified strains of maize produce a [#permalink]

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New post 14 Sep 2017, 22:08
gmataquaguy wrote:
ttar wrote:
Certain genetically modified strains of maize produce a powerful natural insecticide. The
insecticide occurs throughout the plant, including its pollen. Maize pollen is dispersed by
the wind and frequently blows onto milkweed plants that grow near maize fields.
Caterpillars of monarch butterflies feed exclusively on milkweed leaves. When these
caterpillars are fed milkweed leaves dusted with pollen from modified maize plants, they
die. Therefore, by using genetically modified maize, farmers put monarch butterflies at
risk.
Which of the following would it be most useful to determine in order to evaluate the
argument?
A. Whether the natural insecticide is as effective against maize-eating insects as
commercial insecticides typically used on maize are
B. Whether the pollen of genetically modified maize contains as much insecticide as
other parts of these plants
C. Whether monarch butterfly caterpillars are actively feeding during the part of the
growing season when maize is releasing pollen
D. Whether insects that feed on genetically modified maize plants are likely to be
killed by insecticide from the plant’s pollen
E. Whether any maize-eating insects compete with monarch caterpillars for the
leaves of milkweed plants growing near maize fields


Question Type: Evaluate an argument.
Conclusion: Genetically modified maize present danger to butterflies.
My AC is C.

A: Boot out. Argument stem doesnt discuss about "maize-eating insects" and commerical Vs natural insecticide. Out of Scope.
B: Boot out. The argument stem isnt concerned with which part of hte maize plant produces most or least insectiticide.
C: Good Point. Are the catterpillar feeding during the time pollen is released? Keep AC.
D: Boot out. Out of Scope? Insects? We are talking of the sequence of events between maize plants and catterpillar.
E: Boot out. Out of Scope. Why does it matter if there is competition or not.


IMO E is also contender.
If caterpillars face competition, they die because of competition rather than eating pollen. So it will be helpful to know option E.
Can someone please explain logic behind eliminating E?

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Re: Certain genetically modified strains of maize produce a   [#permalink] 14 Sep 2017, 22:08

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Certain genetically modified strains of maize produce a

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