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For some birds the sense of smell appears to play a role in navigation

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ashkg
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For some birds the sense of smell appears to play a role in navigation [#permalink] New post   Updated on: 03 Jul 2021, 11:00
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53% (01:16) correct 47% (01:21) wrong based on 2578 sessions
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For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.

(A) were found to have increased difficulties
(B) have been found to have increased difficulty
(C) were found to have increasing difficulty
(D) had been found to have increased difficulties
(E) have been found to have increasing difficulties
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B

Originally posted by ashkg on 28 Jun 2004, 02:23.
Last edited by Bunuel on 03 Jul 2021, 11:00, edited 2 times in total.
Renamed the topic and edited the question.
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   07 Dec 2015, 11:52
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1. The original source is not GMAT Pill. This is a question from the now banned 1000 series.

2. As the Main clause is a generalization that is given in present tense, the subordinate clause also should follow a present tense format. Hence, all the choices using past tense or past perfect, namely A, C and D can be safely removed.

3. Between B and E, E may be dropped using ‘increasing difficulties’ meaning that the difficulties are still on-going even after homing. Secondly the use of plural 'difficulties' as if there are several types or kinds of difficulties is incorrect.

B is the correct choice for using the appropriate ‘increased difficulty’. Also, note that ‘difficulties’ has been amended to ‘difficulty.’
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   28 Jun 2004, 08:52
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the difference between B and E is in the phrase "increasing difficulty "

increasing difficulties is not required here, just because the pigeons are many in number, "increasing difficulty" describes what the all the pigeons suffer, the plural is not required.

Hence Choice is B
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   28 Jun 2004, 09:03
Ghunoo wrote:
the difference between B and E is in the phrase "increasing difficulty "

increasing difficulties is not required here, just because the pigeons are many in number, "increasing difficulty" describes what the all the pigeons suffer, the plural is not required.

Hence Choice is B


I think that error is more to do with using increasing ( continuous tense) compared with increased, which is better.

I couldn't understand how using the plural difficulties introduces an error.

-ash
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   28 Jun 2004, 19:43
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ashkg wrote:
I think that error is more to do with using increasing ( continuous tense) compared with increased, which is better.

I couldn't understand how using the plural difficulties introduces an error.
-ash


present perfect tense is used for an action that extends from past to present. Here, it's been proved that if we remove the olfactory organs of a pigeon, it will find difficulty in homing. past --> still valid.

E entails present continuous tense. Does that mean difficulty is increasing steadily?? that doesn't hold good.
I don't think 'difficulties plays any role here in chosing the answer.
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   29 Jun 2004, 01:25
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First, "increasing" in E is not right. Simply put, you compare two sets of data: one in which birds have little difficulty in homing and the other in which birds have more difficulty. The difficulty is "enreased", not "encreasing."
Seconds, "difficulty" should be used here.
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   30 Jun 2004, 17:16
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ashkg wrote:
(A) were found to have increased difficulties
(B) have been found to have increased difficulty
(C) were found to have increasing difficulty


I believe that were means that the action has happend in the past and finished, while the experimaent is still valid until now so we have to use the past percfet. I hope this will help. :-D
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   01 Aug 2007, 05:41
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leeye84 wrote:
309. For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.

(A) were found to have increased difficulties
(B) have been found to have increased difficulty
(C) were found to have increasing difficulty
(D) had been found to have increased difficulties
(E) have been found to have increasing difficulties


Very easy question. You just need to pay attention to the words carefully.

Since denotes ongoing/present perfect tense. Therefore, choices BE remain.

Homing is singular. Therefore difficulties is wrong.

OA must be B.
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   25 May 2018, 06:46
egmat
can you please brief the OA?
removed is already in past tense so there should be were instead of have
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   27 May 2018, 00:46
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For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.

with surgically removed olfactory nerves - is a modifier

For some birds the sense of smell appears to play a role in navigation
Since pigeons were found to have increased difficulties in homing <- should be Since pigeons have found to show continuous effect


teaserbae wrote:
egmat
can you please brief the OA?
removed is already in past tense so there should be were instead of have
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   27 May 2018, 02:12
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teaserbae wrote:
egmat
can you please brief the OA?
removed is already in past tense so there should be were instead of have


Hi teaserbae

let me try,

For some birds the sense of smell appears (prsent tense) to play a role in navigation, since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.

'with surgically removed olfactory' - is a modifier, modifying 'pigeons' (these are the special pigeons whose olafactory nerves have been removed)

(A) were found to have increased difficulties - use of past tense is incorrect.
(B) have been found to have increased difficulty - correct choice

Hope it helps.
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   03 Jul 2021, 08:21
Not clear to me why past tense is impossible here. If we take the perspective of the actual finding, we must be able to speak about a finished event. The finding took place and isnt still ongoing. The construction "were found" is not a rarity in research article reviews.

Posted from my mobile device
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   11 Jul 2023, 04:51
daagh wrote:
1. The original source is not GMAT Pill. This is a question from the now banned 1000 series.

2. As the Main clause is a generalization that is given in present tense, the subordinate clause also should follow a present tense format. Hence, all the choices using past tense or past perfect, namely A, C and D can be safely removed.

3. Between B and E, E may be dropped using ‘increasing difficulties’ meaning that the difficulties are still on-going even after homing. Secondly the use of plural 'difficulties' as if there are several types or kinds of difficulties is incorrect.

B is the correct choice for using the appropriate ‘increased difficulty’. Also, note that ‘difficulties’ has been amended to ‘difficulty.’


Hi,
why is the 1000 series banned ?
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink] New post   11 Jul 2023, 04:59
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MayaK wrote:
daagh wrote:
1. The original source is not GMAT Pill. This is a question from the now banned 1000 series.

2. As the Main clause is a generalization that is given in present tense, the subordinate clause also should follow a present tense format. Hence, all the choices using past tense or past perfect, namely A, C and D can be safely removed.

3. Between B and E, E may be dropped using ‘increasing difficulties’ meaning that the difficulties are still on-going even after homing. Secondly the use of plural 'difficulties' as if there are several types or kinds of difficulties is incorrect.

B is the correct choice for using the appropriate ‘increased difficulty’. Also, note that ‘difficulties’ has been amended to ‘difficulty.’


Hi,
why is the 1000 series banned ?


They aren't banned. The original sources of many questions aren't entirely clear, which may cause some to approach the "1000 series" questions with caution. However, most of the questions are perfectly fine, so I'd suggest using them for practice. You can find them all in one post here: https://gmatclub.com/forum/complete-100 ... 12440.html
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Re: For some birds the sense of smell appears to play a role in navigation [#permalink]
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