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Some flowering plant species, entirely dependent on bees for

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Some flowering plant species, entirely dependent on bees for [#permalink]  12 Jan 2007, 22:07
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0% (00:00) correct 100% (01:57) wrong based on 1 sessions
Some flowering plant species, entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed fromâ€”and thus pollinateâ€”only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinateâ€”an arrangement that places the plant species at great risk of extinction. If careless applications of pesticides destroy the pollinating bee species, the plant species itself can no longer reproduce.

The information above, if true, most strongly supports which one of the following?

(A) The earliest species of flowering plants appeared on Earth contemporaneously with the earliest bee species.
(B) If the sole pollinator of a certain plant species is in no danger of extinction, the plant species it pollinates is also unlikely to become extinct.
(C) Some bees are able to gather pollen and nectar from any species of plant.
(D) The blossoms of most species of flowering plants attract some species of bees and do not attract others.
(E) The total destruction of the habitat of some plant species could cause some bee species to become extinct.
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B for me.
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E it is

bees feed from plants

Killing plants kills bees
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OA?
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Tajik4GMAT wrote:
B for me.

B assumes that the extinction of bees is the only cause for the extinction of the plant. There can be other causes.

I will take E.
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Last edited by ncp on 13 Jan 2007, 10:03, edited 1 time in total.
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I considered B & E.

However, plants can become extinct by means other than the extinction of their pollinators.

Thus, I believe that the answer is E.
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Re: cr-plant species [#permalink]  13 Jan 2007, 10:57
AK47 wrote:
Some flowering plant species, entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed fromâ€”and thus pollinateâ€”only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinateâ€”an arrangement that places the plant species at great risk of extinction. If careless applications of pesticides destroy the pollinating bee species, the plant species itself can no longer reproduce.

The information above, if true, most strongly supports which one of the following?

(A) The earliest species of flowering plants appeared on Earth contemporaneously with the earliest bee species.
(B) If the sole pollinator of a certain plant species is in no danger of extinction, the plant species it pollinates is also unlikely to become extinct.
(C) Some bees are able to gather pollen and nectar from any species of plant.
(D) The blossoms of most species of flowering plants attract some species of bees and do not attract others.
(E) The total destruction of the habitat of some plant species could cause some bee species to become extinct.

The highlighted text made me to go for E.

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Now it makes sense
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Re: cr-plant species [#permalink]  13 Jan 2007, 13:31
AK47 wrote:
Some flowering plant species, entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed fromâ€”and thus pollinateâ€”only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinateâ€”an arrangement that places the plant species at great risk of extinction. If careless applications of pesticides destroy the pollinating bee species, the plant species itself can no longer reproduce.

The information above, if true, most strongly supports which one of the following?

(A) The earliest species of flowering plants appeared on Earth contemporaneously with the earliest bee species.
(B) If the sole pollinator of a certain plant species is in no danger of extinction, the plant species it pollinates is also unlikely to become extinct.
(C) Some bees are able to gather pollen and nectar from any species of plant.
(D) The blossoms of most species of flowering plants attract some species of bees and do not attract others.
(E) The total destruction of the habitat of some plant species could cause some bee species to become extinct.

Only B and E remain.
B is out because another factor could cause a plant species to become extinct, other than the pollinator merely existing.

E supports the following stmt:
"Often the pollinating species is so highly adapted that it can feed fromâ€”and thus pollinateâ€”only a single species of plant."

I choose E.
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E !
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for me it is between D and E...
I would choose D
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khaos wrote:
I considered B & E.

However, plants can become extinct by means other than the extinction of their pollinators.

Thus, I believe that the answer is E.

the fact that plants can become extinct by means other than the extinction of their pollinators - is it in the scope of the topic??
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whats wrong in "D"
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I'd go with E

Answer choice B says that X --> Y
not necessarily because it could be that Z --> Y or Y --> X or X -/--> Y

for choice D

(D) The blossoms of most species of flowering plants attract some species of bees and do not attract others.

How is this supported by the question stim ? The stim. uses the word "often" .. this does not necessarily mean "MOST" species.
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Re: cr-plant species [#permalink]  10 Oct 2010, 23:38
OA is E.
Re: cr-plant species   [#permalink] 10 Oct 2010, 23:38
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