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Australian researchers have discovered electroreceptors (sensory organ

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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 09 Jul 2013, 11:05
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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 15 Jul 2013, 10:16
why C is the answer of question 102? isn't D a possible choice??

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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 15 Jul 2013, 10:26
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lucasITA wrote:
why C is the answer of question 102? isn't D a possible choice??


102. Which of the following can be inferred about the experiment described in the first paragraph?


(D) Researchers found that the anteater’s tactile receptors were more easily excited by a strong electrical stimulus than were the electro receptors..
==>here it is written that tactile receptors were more easily excited than electro receptors...
but there is no such comparison done that who will be more easily excited


Australian researchers have discovered
electroreceptors (sensory organs designed to respond
to electrical fields) clustered at the tip of the spiny
anteater's snout. The researchers made this discovery
by exposing small areas of the snout to extremely
weak electrical fields and recording the transmission
of resulting nervous activity to the brain. While it is
true that tactile receptors, another kind of sensory
organ on the anteater's snout,can also respondto
electrical stimuli, such receptors do so only in
response to electrical field strengths about 1,000
times greater than
those known to excite
electroreceptors.

hope it helps
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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 15 Jul 2013, 10:31
lucasITA wrote:
why C is the answer of question 102? isn't D a possible choice??



Im not quite sure to understand what do you mean

C say

(C) Researchers found that some areas of the anteater’s snout were not sensitive to a weak electrical stimulus.

Instead D say

(D) Researchers found that the anteater’s tactile receptors were more easily excited by a strong electrical stimulus than were the electro receptors..

Now, tp be honest D is the mostemtive answer choice among the others \(BUT\) D talks about electrical stimulus stronger instead the passage talks about

Quote:
such receptors do so only in
response to electrical field strengths about 1,000
times greater than those known to excite
electroreceptors.


is not the same thing at all.........

For C we have
Quote:
The researchers made this discovery
by exposing small areas of the snout to extremely
weak electrical fields and recording the transmission
of resulting nervous activity to the brain


That's it. Hope is fine my explanation
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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 19 Jul 2013, 03:38
101.d
102.c
103.a
104.c
105.c :shock: :shock: (never saw this coming!!) :cry:
106.B

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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 20 Aug 2013, 22:08
For question 5, I picked A, but the OA is E. Any explanation to this question?
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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 21 Aug 2013, 19:47
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Juz2play wrote:
For question 5, I picked A, but the OA is E. Any explanation to this question?


Just check the last two lines of the last para.

Still, researchers have observed anteaters
breaking into a nest of ants at an oblique angle and
quickly locating nesting chambers. This ability to
quickly
locate unseen prey suggests, according to the
researchers, that the anteaters were using their
electroreceptors to locate the nesting chambers.

Even I chose A but then re read the last paragraph when I found my answer incorrect.

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Re: Australian researchers have discovered electroreceptors [#permalink]

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New post 09 Sep 2013, 06:46
Can someone explain option 103, and 105 please?
I chose E and A respectively.
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Re: Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 06 May 2016, 07:51
talismaaniac wrote:
anshunadir wrote:
Q3: Last line of the passage clearly suggests that the researchers are agreeing that anteaters located the chambers quickly because of electroreceptors. Hence E

This ability quickly to locate unseen prey suggests, according to the researchers, that the anteaters were using their electroreceptors to locate the nesting chambers.

Q4. The hypotheseis that needs to be strengthened is "anteaters use electroreceptors to detect electrical signals given off by prey"

researchers experimented anteaters in a weak electrical field and concluded that anteaters can detect weak electrical signals and hypothesized their theory that anteaters use electroreceptors to locate their prey. But according to the passage, researchers are still not sure of any electrical signals emanating from termite mounds. This points out a gap in their hyposthesis. option B fillls the gap.

let me know if any further questions.


Ya... What you said about 3 is absolutely correct. Then how come the answer is E? It should be A. Your reasoning suggests A more than E. Am I missing something? 4 is fine.



chigiwigi wrote:
What is the ans to Question 2?


C



Can you please explain how C is the answer to question 2? Thanks.

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Re: Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 02 Jan 2017, 08:37
Can you please provide the answer to Q1 & Q2? Thanks!!

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Re: Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 20 Mar 2017, 21:53
sayantanc2k wrote:
lawiniecke wrote:
Can you please provide the answer to Q1 & Q2? Thahttps://gmatclub.com/forum/posting.p ... ingboxnks!!


The answers have been added.


Hi sayantanc2k,
Can you please provide an explanantion for Q2?
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Last edited by nazgull on 21 Mar 2017, 22:40, edited 1 time in total.

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Re: Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 21 Jul 2017, 05:19
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Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 13 Oct 2017, 05:44
nazgulISB wrote:
sayantanc2k wrote:
lawiniecke wrote:
Can you please provide the answer to Q1 & Q2? Thahttps://gmatclub.com/forum/posting.p ... ingboxnks!!


The answers have been added.


Hi sayantanc2k,
Can you please provide an explanantion for Q2?


My two cents:
Which of the following can be inferred about the experiment described in the first paragraph? [ Australian researchers have discovered electroreceptors (sensory organs designed to respond to electrical fields) clustered at the tip of the spiny anteater’s snout. The researchers made this discovery by exposing small areas of the snout to extremely weak electrical fields and recording the transmission of resulting nervous activity to the brain. ] While it is true that tactile receptors, another kind of sensory organ on the anteater’s snout, can also respond to electrical stimuli, such receptors do so only in response to electrical field strengths about 1,000 times greater than those known to excite electroreceptors.

The likely options to get the reader confused :
(C) Researchers found that some areas of the anteater’s snout were not sensitive to a weak electrical stimulus.
(D) Researchers found that the anteater’s tactile receptors were more easily excited by a strong electrical stimulus than were the electroreceptors.

Why is C the OA?
The finding of the little experiment is bold faced and is what we want to get our inference from. So from this sentence we know that electroreceptors are clustured at the tip of the snout, and hence, only this part responds to electrical fields. Which would mean some areas of the snout are not sensitive to a weal electrical stimulus.

Why is D not correct?
The ease with which or the affinity to strong electrical stimulus by tactile & electroreceptors has not been compared anywhere in the passage. Passage just talks about that tactile receptors getting excited to strong electrical stimulus. In fact, passage doesn't even mention, implicitly or explicitly, that electroreceptors get excited at all to strong electrical stimulus.

Hope this helps. :)
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Re: Australian researchers have discovered electroreceptors (sensory organ [#permalink]

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New post 14 Oct 2017, 21:37
5/6 correct.
Took me 13 minutes.

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Re: Australian researchers have discovered electroreceptors (sensory organ   [#permalink] 14 Oct 2017, 21:37

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