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There is no consensus among researchers regarding what qualifies a

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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 15 Oct 2017, 04:47
AN225 wrote:
The official answer is ADE.
Why 1-A is correct? The question refers to that part
In addition, the distinction between pheromones and odorants— chemicals that are consciously detected
as odors---can be blurry, and some researchers classify pheromones as a type of odorant

So according to these researchers, pheromenes are perceived consiously.

Why 3-E is correct (very tricky, I first got it wrong): The OA for 3 is C not E
The primary purpose of the passage is to
A. compare and contrast the ways in which the vomeronasal organ and the main olfactory systern
process chemicals. << too specific for the main purpose
B. summarize the debate over the role the vomeronasal organ plays in odor perception << too narrow for the main purpose AND the main topic is pheromones, not VNO
C. present some of the issues involved in the debate over what constitutes a pheromone << nice shell game, GMAT! Actually, it is stated in the beginning of the text that pheromens are a type of chemicals. That is it. The rest of the passage is how pheremones are processed and reacted by bodies.
D. propose a new definition of pheromones based on recent research << no new definitions are discussed
E. argue that pheromones should be classified as a type of odorant << not the best answer, but the only one left and it is the correct answer
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 01 Nov 2017, 10:16
8:40 secs :| All Correct
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 10 Dec 2017, 09:37
Took 7 mins , including 3 mins to read the passage . All Correct
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 15 Mar 2018, 05:06
GMATNinja, Could you help with question 1?
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 15 Mar 2018, 16:06
3
hazelnut wrote:
GMATNinja, Could you help with question 1?

Quote:
1. It can be inferred from the passage that in classifying pheromones as a type of odorant, the researchers referred to the highlighted text posit that

(A) pheromones are perceived consciously
(B) most pheromones are processed by the VNO
(C) most chemical signals processed by the VNO are pheromones
(D) Pheromone perception does not occur exclusively between members of the same species.
(E) pheromones do not always elicit a specific behavioral or physiological response

Let's break down the given information:

  • We are told that "some researchers classify pheromones as a type of odorant."
  • Odorants are chemicals that are consciously detected as odors.
  • Thus, those researchers must believe that pheromones are consciously detected (or perceived) as odors.

Quote:
(A) pheromones are perceived consciously

This matches the given information exactly! Keep (A).

Quote:
(B) most pheromones are processed by the VNO

This is evidence that pheromone responses may NOT involve conscious odor perception. This contradicts the views of the highlighted researchers, so eliminate (B).

Quote:
(C) most chemical signals processed by the VNO are pheromones

We don't know whether this is even true based on the information in the passage. Eliminate (C).

Quote:
(D) Pheromone perception does not occur exclusively between members of the same species.

This idea is not discussed in the passage, so eliminate (D).

Quote:
(E) pheromones do not always elicit a specific behavioral or physiological response

We are told that most researchers (including the highlighted researchers) agree that pheromones are "chemicals released by one individual of a species which, when detected by another individual of the same species, elicit a specific behavioral or physiological response." So the highlighted researchers would NOT agree with choice (E). Eliminate this one.

(A) is the best choice.
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 27 Apr 2018, 14:33
GMATNinja

Hi - could you please go over question 2 ?
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 03 Jun 2018, 08:38
GMATNinja

Hi GMATNinja, could you please help explain question 3? Why C is correct but not D?

Which part of the passage discusses what constitute a pheromone?

And doesn't the passpage propose a new definition, which "specify that the response to pheromones must be unconscious"?

Thanks so much.
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 27 Jul 2018, 23:03
Quote:
2. According to the passage, the fact that pheromones are processed by the VNO in many animal species has been taken as evidence of which of the following?

(A) The accessory and main olfactory systems are not separate
(B) Odorants and pheromones are not distinct types of chemicals.
(C) Odorants and pheromones both elicit a specific behavioral response.
(D) Pheromones do not trigger conscious sensations of smell.
(E) Pheromones aid animals in tracking prey.


HI GMATNinja , mikemcgarry , egmat , sayantanc2k, RonPurewal , DmitryFarber , MagooshExpert (Carolyn), ccooley , GMATNinjaTwo , SarahPurewal

Can you please help me with above question?
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 28 Jul 2018, 01:11
1
NandishSS wrote:
Quote:
2. According to the passage, the fact that pheromones are processed by the VNO in many animal species has been taken as evidence of which of the following?

(A) The accessory and main olfactory systems are not separate
(B) Odorants and pheromones are not distinct types of chemicals.
(C) Odorants and pheromones both elicit a specific behavioral response.
(D) Pheromones do not trigger conscious sensations of smell.
(E) Pheromones aid animals in tracking prey.


HI GMATNinja , mikemcgarry , egmat , sayantanc2k, RonPurewal , DmitryFarber , MagooshExpert (Carolyn), ccooley , GMATNinjaTwo , SarahPurewal

Can you please help me with above question?


Hello,

I tried the question and got it correct. Following is my analysis.

The relevant portion from the passage is "Evidence that pheromone responses may not involve conscious odor perception comes from the finding ... " and then presents the fact in question. So we can infer that the given fact is used as an evidence that pheromone responses doesn't involve conscious odor perception and option D reflects this. Hence I chose option D.

Let me know what you think ?
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 29 Jul 2018, 16:27
NandishSS wrote:
Quote:
2. According to the passage, the fact that pheromones are processed by the VNO in many animal species has been taken as evidence of which of the following?

(A) The accessory and main olfactory systems are not separate
(B) Odorants and pheromones are not distinct types of chemicals.
(C) Odorants and pheromones both elicit a specific behavioral response.
(D) Pheromones do not trigger conscious sensations of smell.
(E) Pheromones aid animals in tracking prey.


HI GMATNinja , mikemcgarry , egmat , sayantanc2k, RonPurewal , DmitryFarber , MagooshExpert (Carolyn), ccooley , GMATNinjaTwo , SarahPurewal

Can you please help me with above question?

Hi NandishSS,

Glad to help! :-)

workout is correct here -- the relevant portion of the passage is: "Evidence that pheromone responses may not involve conscious odor perception comes from the finding that in many species, pheromones are processed by the VNO". So this tells us that the fact pheromones are processed by the VNO provides evidence that pheromones do not trigger a conscious sensation of smell, which matches choice D :-)

Let me know if that isn't clear!
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 30 Jul 2018, 02:39
1. As per the text, it is suggested from the discussion that the pheromones should be detected unconsciously. However, if the pheromones are considered similar to odorant which can be detected consciously than it can be concluded that pheromones should be detected consciously only being similar to odorant.
The answer is supported from lines 2-3 of the text.
Let us do POE
A- This is supported as per the discussion made in the passage. Correct answer.
B- Now, since if the pheromones are same as odorants, choice B does not hold true. Also, see the choice suggests, “most”, and there is such comparison made in the text. Inference is a logical conclusion that should be supported entirely from the text.
C- On the same grounds as B, choice C is eliminated.
D- The information provided id out of scope.
E- The question focuses only on the opinion of the researchers. Do not get deviated and get into this trap answer choice.
2. A- The subject of the question remains to be pheromones and not accessory and main olfactory systems.
B. Reversal of what is stated in the passage.
C- Out of context .VNO is cited to explain that there is a separate system to detect pheromones.
D- Is the correct answer.
E –Trap answer choice, to get better clarity refer back to the text. The example of snake mentioned in the last line of the passage is not provided to justify choice E.

3. A –The passage’s main idea is to discuss pheromones hence choice A goes out.
B-Again the correct answer should focus on pheromones being the main point of discussion, choice B gets eliminated.
C –Correct (The passage provides with the basic definition of pheromones. Then the author talks about the distinction between odorants and pheromones and beliefs of some researchers. Later, the role of VNO is discussed.)
D- The author does not conclude a new definition.
E-There is no support from the passage which suggests that the author is trying to ascertain this as a correct information.
Hope it helps.
Keep practicing.
All the best!!
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Re: There is no consensus among researchers regarding what qualifies a  [#permalink]

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New post 03 Sep 2018, 08:39
Boomshockalocka wrote:
Hi GMATNinja, could you please help explain question 3? Why C is correct but not D?

Which part of the passage discusses what constitute a pheromone?

And doesn't the passpage propose a new definition, which "specify that the response to pheromones must be unconscious"?

Thanks so much.

I'm an airhead, and wrote this a few weeks ago when I didn't have internet access... but never posted it. There are lots of great responses here already, but I'll pile on, just in case it's helpful.

Quote:
3. The primary purpose of the passage is to

We're asked to state the primary purpose. It's not enough to pick a choice that seems factually true. We need to pick the choice that best states the overall reason the author is writing the entire passage. And here's the structure of the passage:

  • There's no consensus among researchers regarding what qualifies as a pheremone.
  • Some researchers specify that pheremones must be unconsciously detected.
  • On the other hand, some researchers classify pheremones as odorants, which means that they must be consciously detected.
  • In many species, pheremones are processed by the VNO, which means that pheremones could be odorants but still be unconsciously detected.
  • The VNO also processes non-odorant chemicals, which can also trigger a behavioral response without any kind of odor.

This is a funky cloud of smells (and non-smells). The author is presenting one new fact after the next, repeatedly challenging the ways that researchers classify pheromones by bringing up evidence that would contradict those classifications. By the end of the passage, it seems like none of the classifications really work. So rather than leading us to any one definition, the author is writing this passage in order to walk us through all of the ways that researchers attempt to classify pheromones. No wonder there's no consensus over what qualifies as a pheromone.

Quote:
(A) compare and contrast the ways in which the vomeronasal organ and the main olfactory system process chemicals.

The author didn't write this entire paragraph just to tell us that the VNO and the main olfactory system are similar but different. Instead, author brings up this evidence to serve a bigger point: that the classifications researchers are using aren't very helpful. Eliminate (A).

Quote:
(B) summarize the debate over the role the vomeronasal organ plays in odor perception

The phrase "summarize the debate" is tempting. But like (A), choice (B) focuses too narrowly on the VNO. The passage isn't about the debate over VNO. It's about the debate over pheromone classifications. Eliminate (B).

Quote:
(C) present some of the issues involved in the debate over what constitutes a pheromone

Exactly! The author is walking us through the various classifications of a pheremone and citing evidence to support (or complicate) each one. (C) matches our understanding of the overall purpose, so we'll keep it around.

Quote:
(D) propose a new definition of pheromones based on recent research

The author never proposes a new definition. The author lists multiple definitions proposed by researchers, but doesn't state that any one of them is the one we should accept. At the end of the passage, the author hasn't shown that any of these definitions is satisfactory, and the debate goes on without consensus. That's why we eliminate (D).

Quote:
(E) argue that pheromones should be classified as a type of odorant

Again, this is not why the author is writing the passage as a whole. It's just one of the researcher viewpoints that the author presents in order to lay out all the issues at play in this debate. Eliminate (E).

(C) Is the only good choice available, and it's a fine summary of why the author wrote this passage.

I hope this helps!
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