|
Author |
Message |
|
TAGS:
|
|
|
Director
Joined: 29 Jul 2006
Posts: 877
Followers: 3
Kudos [?]:
10
[0], given: 0
|
Some flowering plant species, entirely dependent on bees for [#permalink]
 04 Apr 2007, 05:02
Question Stats:
0% (00:00) correct
 0% (00:00) wrong based on 0 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 from—and thus pollinate—only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinate—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.
Whats wrong with B ??
|
|
|
|
|
|
|
VP
Joined: 15 Jul 2004
Posts: 1482
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
Followers: 10
Kudos [?]:
61
[0], given: 13
|
Re: CR-flowering plants [#permalink]
04 Apr 2007, 05:51
vineetgupta 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 from—and thus pollinate—only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinate—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.
Whats wrong with B ??
I will go with D here. I think B places the argument the other way around. We don't know what'll happen to the bees if the plants don't survive. We know that if bees are killed by insecticides then pollination (and hence reproduction and survival of plants) will be endangered. So B is according to me out of the scope of this question.
|
|
|
|
|
|
Manager
Joined: 22 Feb 2007
Posts: 68
Followers: 1
Kudos [?]:
0
[0], given: 0
|
I go with E
1) Some flowering plant species....are the only source of food for bees.
2) Often the pollinating species is so highly adapted that it can feed from...only a single species of plant
If plants are not available, no food for bees would be available to sustain life.
OA?
|
|
|
|
|
|
VP
Joined: 06 Feb 2007
Posts: 1024
Followers: 17
Kudos [?]:
77
[0], given: 0
|
B is incorrect because we dont' necessarily have a connection between the two cause-effect statements. If the sole pollinator of a certain plant species is in no danger of extinction, the plant species it pollinates still can go exctinct from other causes, such as drought.
As far as the the answer goes, I like E.
From the paragraph, we know that SOME of the plant species have eveloved to attract a certain bee species. Therefore, the total destruction of the habitat of SOME plant species could cause some bee species to become extinct.
|
|
|
|
|
|
Senior Manager
Joined: 02 Sep 2006
Posts: 255
Followers: 1
Kudos [?]:
4
[0], given: 0
|
A, C are out of scope
B is wrong cus the extinction of pollinators is not the issue here
D just summarises the issue
E is a relevant issue that supports the argument...
so yeah E
|
|
|
|
|
|
Manager
Joined: 26 Feb 2007
Posts: 115
Followers: 1
Kudos [?]:
1
[0], given: 0
|
E.
|
|
|
|
|
|
Manager
Joined: 20 Nov 2006
Posts: 215
Followers: 1
Kudos [?]:
5
[0], given: 0
|
I too choose E.
because,
Some flowering plant species, entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, [color=blue]which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed from—and thus pollinate[/color]
This indicates that if the habitat is dstroyed the bees will eget extincted.
|
|
|
|
|
|
Manager
Joined: 07 Feb 2007
Posts: 212
Followers: 1
Kudos [?]:
6
[0], given: 0
|
Re: CR-flowering plants [#permalink]
04 Apr 2007, 18:08
vineetgupta 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 from—and thus pollinate—only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinate—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.
Whats wrong with B ??
From the last sentence, we know "destroy the pollinating bee species" (X)only if "the plant species itself can no longer reproduce"(Y), which equals "(not Y) only if (not X)" but not "(not X) only if (not Y)"--the later one is B.
|
|
|
|
|
|
Director
Joined: 29 Jul 2006
Posts: 877
Followers: 3
Kudos [?]:
10
[0], given: 0
|
The OA is E.
|
|
|
|
|
|
VP
Joined: 07 Nov 2005
Posts: 1134
Location: India
Followers: 2
Kudos [?]:
22
[0], given: 1
|
surbab wrote: I too choose E.
because,
Some flowering plant species, entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, [color=blue]which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed from—and thus pollinate[/color]
This indicates that if the habitat is destroyed the bees will get extincted.
Bingo 
_________________
Trying hard to conquer Quant.
|
|
|
|
|
|
Manager
Joined: 28 Feb 2007
Posts: 199
Location: California
Followers: 2
Kudos [?]:
2
[0], given: 0
|
Re: CR-flowering plants [#permalink]
04 Apr 2007, 21:41
vineetgupta 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 from—and thus pollinate—only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinate—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.
Whats wrong with B ??
Answer: E
|
|
|
|
|
|
|
Re: CR-flowering plants
[#permalink]
04 Apr 2007, 21:41
|
|
|
|
|
|
|
|
|
|
Moderators:
tuanquang269, RaviChandra, Vercules, Legendaddy, noboru, Marcab, metallicafan, rajeevrks27, willigetmylifeback, mikemcgarry, souvik101990, doe007, MacFauz, PTK, carcass, kissthegmat, Narenn
|
close
