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# The fossil remains of the first flying vertebrates, the

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Manager
Joined: 30 Dec 2015
Posts: 84
GPA: 3.92
WE: Engineering (Aerospace and Defense)
Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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13 Jul 2016, 18:25
I used the process elimination for question 7, took a lot of re-glancing through the passage:
7. It can be inferred from the passage that some scientists believe that pterosaurs
(B) had sharp teeth for tearing food: No mention of their teeth in the passage
(C) were attacked and eaten by larger reptiles: No mention of pterosaur being prey to a specific predator
(D) had longer tails than many birds: Initially thought this was the correct ans, but glanced through the passage and no mention of pterosaurs tail as compared to birds
(E) consumed twice their weight daily to maintain their body temperature: This one is tricky too, passage does mention that pterosaurs were warm blooded, but Huxley does give a hypothesis for the same with no mention of pterosaurs feeding habit.

(A) lived near large bodies of water : By process of elimination, this is what I GUESSED and also thet fact that "high waves to channel updrafts" was mentioned towards the end of the passage. Very tricky to be a confident YES.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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13 Jul 2016, 18:26
I used the process elimination for question 7, took a lot of re-glancing through the passage:
7. It can be inferred from the passage that some scientists believe that pterosaurs
(B) had sharp teeth for tearing food: No mention of their teeth in the passage
(C) were attacked and eaten by larger reptiles: No mention of pterosaur being prey to a specific predator
(D) had longer tails than many birds: Initially thought this was the correct ans, but glanced through the passage and no mention of pterosaurs tail as compared to birds
(E) consumed twice their weight daily to maintain their body temperature: This one is tricky too, passage does mention that pterosaurs were warm blooded, but Huxley does give a hypothesis for the same with no mention of pterosaurs feeding habit.

(A) lived near large bodies of water : By process of elimination, this is what I GUESSED and also the fact that "high waves to channel updrafts" was mentioned towards the end of the passage. Very tricky to be a confident YES.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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14 Jul 2016, 00:12
Done.
passage3'52-total9'
DBCBABA
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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Updated on: 11 Dec 2016, 07:44
2
The fossil remains of the first flying vertebrates, the
pterosaurs, have intrigued paleontologists for more
than two centuries. How such large creatures, which
weighed in some cases as much as a piloted hang-glider
(5) and had wingspans from 8 to 12 meters, solved the
problems of powered flight, and exactly what these
creatures were--reptiles or birds-are among the ques-
tions scientists have puzzled over.
Perhaps the least controversial assertion about the
(10) pterosaurs is that they were reptiles. Their skulls,
pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the
class of birds. In pterosaurs a greatly elongated fourth
finger of each forelimb supported a winglike membrane.
(15) The other fingers were short and reptilian, with sharp
claws. In birds the second finger is the principal strut
of the wing, which consists primarily of feathers. If the
pterosaurs walked on all fours, the three short fingers
may have been employed for grasping. When a
(20) pterosaur walked or remained stationary, the fourth
finger, and with it the wing, could only turn upward in
an extended inverted V-shape along each side of the animal's body.
The pterosaurs resembled both birds and bats in
(25) their overall structure and proportions. This is not sur-
prising because the design of any flying vertebrate is
subject to aerodynamic constraints. Both the pterosaurs
and the birds have hollow bones, a feature that repre-
sents a savings in weight. In the birds, however, these
(30) bones are reinforced more massively by internal struts.
Although scales typically cover reptiles, the
pterosaurs probably had hairy coats. T.H. Huxley rea-
soned that flying vertebrates must have been warm-
blooded because flying implies a high rate of
(35) metabolism, which in turn implies a high internal tem-
perature. Huxley speculated that a coat of hair would
insulate against loss of body heat and might streamline
the body to reduce drag in flight. The recent discovery
of a pterosaur specimen covered in long, dense, and
(40) relatively thick hairlike fossil material was the first clear
evidence that his reasoning was correct.
Efforts to explain how the pterosaurs became air-
borne have led to suggestions that they launched them-
selves by jumping from cliffs, by dropping from trees.
(45) or even by rising into light winds from the crests of
waves. Each hypothesis has its difficulties. The first
wrongly assumes that the pterosaurs' hind feet resembled
a bat's and could serve as hooks by which the
animal could hang in preparation for flight. The second
(50) hypothesis seems unlikely because large pterosaurs
could not have landed in trees without damaging their
wings. The third calls for high waves to channel
updrafts. The wind that made such waves however,
might have been too strong for the pterosaurs to
(55) control their flight once airborne.
1. It can be inferred from the passage that scientists now
generally agree that the
(A) enormous wingspan of the pterosaurs enabled
them to fly great distances
(B) structure of the skeleton of the pterosaurs suggests a
close evolutionary relationship to bats
(C) fossil remains of the pterosaurs reveal how they
solved the problem of powered flight
(D) pterosaurs were reptiles
(E) pterosaurs walked on all fours

2. The author views the idea that the pterosaurs
became airborne by rising into light winds created
by waves as
(A) revolutionary
(B) unlikely
(C) unassailable
(D) probable
(E) outdated

3. According to the passage, the skeleton of a
pterosaur can be distinguished from that of a bird by
the
(A) size of its wingspan
(B) presence of hollow spaces in its bones
(C) anatomic origin of its wing strut
(D) presence of hook like projections on its hind feet
(E) location of the shoulder joint joining the wing to its
body

4. The ideas attributed to T.H. Huxley in the passage
suggest that he would most likely agree with which
of the following statements?
(A) An animal's brain size has little bearing on its
ability to master complex behaviors.
(B) An animal's appearance is often influenced by
environmental requirements and physical
capabilities.
(C) Animals within a given family group are unlikely
to change their appearance dramatically over a
period of time.
(D) The origin of flight in vertebrates was an
accidental development rather than the outcome
of specialization or adaptation.
(E) The pterosaurs should be classified as birds, not
reptiles.

5. It can be inferred from the passage that which of the
following is characteristic of the pterosaurs?
(A) They were unable to fold their wings when not in
use.
(B) They hung upside down from branches as bats
do before flight.
(C) They flew in order to capture prey.
(D) They were an early stage in the evolution of the
birds.
(E) They lived primarily in a forest like habitat.

6.Which of the following best describes the organization
of the last paragraph of the passage?
(A) New evidence is introduced to support a
traditional point of view.
(B) Three explanations for a phenomenon are
presented, and each is disputed by means of
specific information.
(C) Three hypotheses are outlined, and evidence
supporting each is given.
(D) Recent discoveries are described, and their
implications for future study are projected
(E) A summary of the material in the preceding
paragraphs is presented, and conclusions are
drawn.

7. It can be inferred from the passage that some
scientists believe that pterosaurs
(A) lived near large bodies of water
(B) had sharp teeth for tearing food
(C) were attacked and eaten by larger reptiles
(D) had longer tails than many birds
(E) consumed twice their weight daily to maintain
their body temperature

_________________

Citius, Altius, Fortius

Originally posted by TheMechanic on 04 Dec 2016, 02:49.
Last edited by TheMechanic on 11 Dec 2016, 07:44, edited 1 time in total.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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04 Dec 2016, 02:57

Kudos if you liked the passage.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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04 Dec 2016, 17:55
TheMechanic wrote:

Kudos if you liked the passage.

Request Expert opinion on Q3.

Also request, the difficulty of this passage be reset to a appropriate level.

Thank you.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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06 Dec 2016, 03:18
Hello

Please clarify my doubt regarding question 3, My answer is C. Please tell how B can distinguish pterosaur from a bird?
C) anatomic origin of its wing strut - clearly distinguish it from bird
B) both of them have hollow bones - A common feature and it wont distinguish right?

Thanks!
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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07 Dec 2016, 08:04
gsrividhya wrote:
Hello

Please clarify my doubt regarding question 3, My answer is C. Please tell how B can distinguish pterosaur from a bird?
C) anatomic origin of its wing strut - clearly distinguish it from bird
B) both of them have hollow bones - A common feature and it wont distinguish right?

Thanks!

To quote the passage bit where the 3rd question is directed:

Perhaps the least controversial assertion about the
(10) pterosaurs is that they were reptiles. Their skulls,
pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the
class of birds
In pterosaurs a greatly elongated fourth
finger of each forelimb supported a winglike membrane.
(15) The other fingers were short and reptilian, with sharp
claws. In birds the second finger is the principal strut
of the wing, which consists primarily of feathers. If the
pterosaurs walked on all fours, the three short fingers
may have been employed for grasping.
When a
(20) pterosaur walked or remained stationary, the fourth
finger, and with it the wing, could only turn upward in
an extended inverted V-shape along each side of the animal's body.
The pterosaurs resembled both birds and bats in
(25) their overall structure and proportions. This is not sur-
prising because the design of any flying vertebrate is
subject to aerodynamic constraints. Both the pterosaurs
and the birds have hollow bones, a feature that repre-
sents a savings in weight.

The above should help us eliminate some options:

3. According to the passage, the skeleton of a
pterosaur can be distinguished from that of a bird by
the
(A) size of its wingspan [this particular comparison with birds hasn't been made]
(B) presence of hollow spaces in its bones [Both have hollow bones]
(C) anatomic origin of its wing strut [YES!!!!]
(D) presence of hook like projections on its hind feet [Not a distinct factor; both birds and pterosaur have hook like projections]
(E) location of the shoulder joint joining the wing to its body [Not a differentiating factor]

Hope this helps in clarifying the doubts around this question.
_________________

Citius, Altius, Fortius

Manager
Joined: 15 Apr 2016
Posts: 71
Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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08 Dec 2016, 01:10
TheMechanic wrote:
gsrividhya wrote:
Hello

Please clarify my doubt regarding question 3, My answer is C. Please tell how B can distinguish pterosaur from a bird?
C) anatomic origin of its wing strut - clearly distinguish it from bird
B) both of them have hollow bones - A common feature and it wont distinguish right?

Thanks!

To quote the passage bit where the 3rd question is directed:

Perhaps the least controversial assertion about the
(10) pterosaurs is that they were reptiles. Their skulls,
pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the
class of birds
In pterosaurs a greatly elongated fourth
finger of each forelimb supported a winglike membrane.
(15) The other fingers were short and reptilian, with sharp
claws. In birds the second finger is the principal strut
of the wing, which consists primarily of feathers. If the
pterosaurs walked on all fours, the three short fingers
may have been employed for grasping.
When a
(20) pterosaur walked or remained stationary, the fourth
finger, and with it the wing, could only turn upward in
an extended inverted V-shape along each side of the animal's body.
The pterosaurs resembled both birds and bats in
(25) their overall structure and proportions. This is not sur-
prising because the design of any flying vertebrate is
subject to aerodynamic constraints. Both the pterosaurs
and the birds have hollow bones, a feature that repre-
sents a savings in weight.

The above should help us eliminate some options:

3. According to the passage, the skeleton of a
pterosaur can be distinguished from that of a bird by
the
(A) size of its wingspan [this particular comparison with birds hasn't been made]
(B) presence of hollow spaces in its bones [Both have hollow bones]
(C) anatomic origin of its wing strut [YES!!!!]
(D) presence of hook like projections on its hind feet [Not a distinct factor; both birds and pterosaur have hook like projections]
(E) location of the shoulder joint joining the wing to its body [Not a differentiating factor]

Hope this helps in clarifying the doubts around this question.

Hi TheMechanic,

But the OA specified for the 3rd question is B ?
_________________

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Shri
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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08 Dec 2016, 01:39
Please also tell me how is the OA for 7th is A ?
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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09 Dec 2016, 01:03
Shrivathsan wrote:
Please also tell me how is the OA for 7th is A ?

Efforts to explain how the pterosaurs became air-
borne
have led to suggestions that they launched them-
selves by jumping from cliffs, by dropping from trees.
(45) or even by rising into light winds from the crests of
waves
.
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Joined: 15 Apr 2016
Posts: 71
Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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09 Dec 2016, 02:44
Drblabla wrote:
Shrivathsan wrote:
Please also tell me how is the OA for 7th is A ?

Efforts to explain how the pterosaurs became air-
borne
have led to suggestions that they launched them-
selves by jumping from cliffs, by dropping from trees.
(45) or even by rising into light winds from the crests of
waves
.

Oh.. Couldn't deduce from that.. Thank you

Sent from my MotoG3 using GMAT Club Forum mobile app
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Shri
-------------------------------
GMAT is not an Exam... it is a war .. Let's Conquer !!!

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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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10 Dec 2016, 08:45
Shrivathsan wrote:
TheMechanic wrote:
gsrividhya wrote:
Hello

Please clarify my doubt regarding question 3, My answer is C. Please tell how B can distinguish pterosaur from a bird?
C) anatomic origin of its wing strut - clearly distinguish it from bird
B) both of them have hollow bones - A common feature and it wont distinguish right?

Thanks!

To quote the passage bit where the 3rd question is directed:

Perhaps the least controversial assertion about the
(10) pterosaurs is that they were reptiles. Their skulls,
pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the
class of birds
In pterosaurs a greatly elongated fourth
finger of each forelimb supported a winglike membrane.
(15) The other fingers were short and reptilian, with sharp
claws. In birds the second finger is the principal strut
of the wing, which consists primarily of feathers. If the
pterosaurs walked on all fours, the three short fingers
may have been employed for grasping.
When a
(20) pterosaur walked or remained stationary, the fourth
finger, and with it the wing, could only turn upward in
an extended inverted V-shape along each side of the animal's body.
The pterosaurs resembled both birds and bats in
(25) their overall structure and proportions. This is not sur-
prising because the design of any flying vertebrate is
subject to aerodynamic constraints. Both the pterosaurs
and the birds have hollow bones, a feature that repre-
sents a savings in weight.

The above should help us eliminate some options:

3. According to the passage, the skeleton of a
pterosaur can be distinguished from that of a bird by
the
(A) size of its wingspan [this particular comparison with birds hasn't been made]
(B) presence of hollow spaces in its bones [Both have hollow bones]
(C) anatomic origin of its wing strut [YES!!!!]
(D) presence of hook like projections on its hind feet [Not a distinct factor; both birds and pterosaur have hook like projections]
(E) location of the shoulder joint joining the wing to its body [Not a differentiating factor]

Hope this helps in clarifying the doubts around this question.

Hi TheMechanic,

But the OA specified for the 3rd question is B ?

Hi, answer to question #3 is C? I think that you need to fix this because the buttons on the top indicate that the correct one is B.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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11 Dec 2016, 07:46
My Bad! The answer is corrected !!!
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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17 Dec 2016, 11:43
This passage has so much info. It took me 13 min to solve all the questions(reading time included) with one wrong (as per the OA).

Can someone please tell me how to read these types of passages. Is there some specific technique for this?
Should we skim through all the details mentioned in the passage?
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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19 Dec 2016, 06:00
1
PerseveranceWins wrote:
This passage has so much info. It took me 13 min to solve all the questions(reading time included) with one wrong (as per the OA).

Can someone please tell me how to read these types of passages. Is there some specific technique for this?
Should we skim through all the details mentioned in the passage?

You should remember that per passage 4 to 9 questions are designed, meaning that reading all details is a waste of your time. Imagine on the job you receive an annual report of 300 pages from which 5 questions will be asked during a video conference. Clearly reading the whole thing is a waste of your time.

What I recommend is reading all structure words that convey most meaning with great attention, while just letting your eyes run over technical jargon or the content of details. Knowing where details are located is your mission. Once a questions asks for a specific detail you know where it is discussed and during this second-read you try to understand that particular piece of information with great attention.

So focus on understanding the meaning of each paragraph and do not try to understand or remember every last detail. Understanding or remembering details are actually a distraction to your reading comprehension.

Example first read-through (bold = great attention, not bold = just run your eyes over, make sure to keep your reading pace up)

The fossil remains of the first flying vertebrates, the
pterosaurs, have intrigued paleontologists for more
than two centuries. How such large creatures, which
weighed in some cases as much as a piloted hang-glider
(5) and had wingspans from 8 to 12 meters, solved the
problems of powered flight
, and exactly what these
creatures were
--reptiles or birds-are among the ques-
tions scientists have puzzled over.

As you can see those few words are all you need to know to understand the meaning of the paragraph. Again, do not distract yourself with the content of details or technical jargon. If those details are really important, you will find out when a question mentions them. You will know where to find it and (do your second read-through) read the relevant information/sentence(s) just like in critical reasoning.
Manager
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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19 Dec 2016, 08:12
Drblabla wrote:
PerseveranceWins wrote:
This passage has so much info. It took me 13 min to solve all the questions(reading time included) with one wrong (as per the OA).

Can someone please tell me how to read these types of passages. Is there some specific technique for this?
Should we skim through all the details mentioned in the passage?

You should remember that per passage 4 to 9 questions are designed, meaning that reading all details is a waste of your time. Imagine on the job you receive an annual report of 300 pages from which 5 questions will be asked during a video conference. Clearly reading the whole thing is a waste of your time.

What I recommend is reading all structure words that convey most meaning with great attention, while just letting your eyes run over technical jargon or the content of details. Knowing where details are located is your mission. Once a questions asks for a specific detail you know where it is discussed and during this second-read you try to understand that particular piece of information with great attention.

So focus on understanding the meaning of each paragraph and do not try to understand or remember every last detail. Understanding or remembering details are actually a distraction to your reading comprehension.

Example first read-through (bold = great attention, not bold = just run your eyes over, make sure to keep your reading pace up)

The fossil remains of the first flying vertebrates, the
pterosaurs, have intrigued paleontologists for more
than two centuries. How such large creatures, which
weighed in some cases as much as a piloted hang-glider
(5) and had wingspans from 8 to 12 meters, solved the
problems of powered flight
, and exactly what these
creatures were
--reptiles or birds-are among the ques-
tions scientists have puzzled over.

As you can see those few words are all you need to know to understand the meaning of the paragraph. Again, do not distract yourself with the content of details or technical jargon. If those details are really important, you will find out when a question mentions them. You will know where to find it and (do your second read-through) read the relevant information/sentence(s) just like in critical reasoning.

Hey thanks a lot for your response.

I will try to incorporate the point about stressing more on structure words and not much attention for details.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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28 Jan 2017, 06:10
Good exercise. Took 13 min including reading passage and answering Q. Got 02 wrong.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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20 Feb 2017, 11:50
7min 20 sec. including reading time. All correct except last one.
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Re: The fossil remains of the first flying vertebrates, the  [#permalink]

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21 Feb 2017, 07:23
9 minutes, 55 seconds including reading time.
All correct except the last question.

Essay- lengthy but easy to understand with straight forward questions.
Re: The fossil remains of the first flying vertebrates, the &nbs [#permalink] 21 Feb 2017, 07:23

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