Networks of blood vessels in bats’ wings serve only to disperse heat g

"c" for sure , similer Q is mentioned in OG 11

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Networks of blood vessels in bats' wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings. Thus paleontologists' recent discovery that the winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings provides evidence for the hypothesis that Sandactylus flew by flapping its wings, not just by gliding.
Inthe passage, the author develops the argument by
(A) forming the hypothesis that best explains several apparently conflicting pieces of evidence
(B) reinterpreting evidence that had been used to support an earlier theory
(C) using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon
(D) speculating about how structures observed in present-day creatures might have developed from similar
structures in creatures now extinct
(E) pointing out differences in the physiological demands that flight makes on large, as opposed to small, creatures


Official Answer is C.

My problem is I choosed down to B and C, and selected B, and got wrong!!!! The reason I eliminate C is
1. The phenomenon was not unknown, in question stimulus you find the word "hypothesis", so the analogy of flight technique of bats and Sandactylus was not unknown.

The reasons I chose B are
1. "the winged dinosaur Sandactylus had similar networks of blood vessels" was an evidence
2. this evidence was reintrepeting to establish same flight technique
3. this evidence also was supporting earlier percieved theory that birds network of blood vessels in their wings usually fly by gliding and sometimes flapping their wings.
4. I thought this was a strengthening question "the author develops the argument by", if only a newly discovered evidence support the earlier theory, then the argument will be "developed"

Please, help me finding my misunderstandings...!!!

FACT : Networks of blood vessels in bats' wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings.
The author also knows a fact that BAT fly using its wing.Author makes an conclusion that Because BAT has blood vessels in wings , It flies.
Blood vessel in wings ---A
BAT flies using its wings ------B
If A happens then B will happen [b]Conclusion 1[/b]

This is a Known Phenomenon.

paleontologists' recent discovery that the winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings provides evidence for the hypothesis that Sandactylus flew by flapping its wings, not just by gliding.

It was hypothesized that Sandactylus flew by flapping its wings, not just by gliding. It was not proven.
We have a FACT that Sandactylus has similar networks of blood vessels as bat in the skin of its wings.
The Author takes this above fact and apply Conclusion 1 on this and reach to a final conclusion that Sandactylus flew by flapping its wings, not just by gliding.

(B) reinterpreting evidence that had been used to support an earlier theory.


(C) using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon
Correct. Author uses the conclusion of BAT and apply the analogy to Sandactylus.

I hope it helps

This question appears before in Gmat club, but it has different format


Networks of blood vessels in bats' wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings. Thus paleontologists' recent discovery that the winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings provides evidence for the hypothesis that Sandactylus flew by flapping its wings, not just by gliding.
Inthe passage, the author develops the argument by
(A) forming the hypothesis that best explains several apparently conflicting pieces of evidence
(B) reinterpreting evidence that had been used to support an earlier theory
(C) using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon
(D) speculating about how structures observed in present-day creatures might have developed from similar
structures in creatures now extinct
(E) pointing out differences in the physiological demands that flight makes on large, as opposed to small, creatures


Official Answer is C.

My problem is I choosed down to B and C, and selected B, and got wrong!!!! The reason I eliminate C is
1. The phenomenon was not unknown, in question stimulus you find the word "hypothesis", so the analogy of flight technique of bats and Sandactylus was not unknown.

The reasons I chose B are
1. "the winged dinosaur Sandactylus had similar networks of blood vessels" was an evidence
2. this evidence was reintrepeting to establish same flight technique
3. this evidence also was supporting earlier percieved theory that birds network of blood vessels in their wings usually fly by gliding and sometimes flapping their wings.
4. I thought this was a strengthening question "the author develops the argument by", if only a newly discovered evidence support the earlier theory, then the argument will be "developed"

Please, help me finding my misunderstandings...!!!

yes, of course, obviously, remarkably. Actually I misunderstood the word "reinterpret"

Hi Experts, please advice on this one. I had great problems to decide between B and C. Picked B.

Why is B wrong ? Reinterpreting the evidence = evidence that bats wings serve to disperse heat for the discovery of Sandactctylus
New theory about dinos - earlier theory about Bats, so this evidence used in the eralier theory about bats is used to support a recent theory about dinos.......

Networks of blood vessels in bats’ wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings. Thus
paleontologists’ recent discovery that the winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings provides evidence for the
hypothesis that Sandactylus flew by flapping its wings, not just by gliding.
In the passage, the author develops the argument by
(A) forming the hypothesis that best explains several apparently conflicting pieces of evidence
(B) reinterpreting evidence that had been used to support an earlier theory
(C) using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon
(D) speculating about how structures observed in present-day creatures might have developed from similar structures in creatures now extinct
(E) pointing out differences in the physiological demands that flight makes on large, as opposed to small, creatures


Press kudos if you like the post

Hi There! I have outlined the explanation in the quote below. This is a type of question that asks you to analyze which method is used to develop the argument - is the author giving an example? comparing one evidence with another? refuting evidence with another? contrasting two cases?

Read below:



Hope this helps.

Hello BrainLab,

"Networks of blood vessels in bats’ wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings"

Next:
"winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings "

Conclusion Sandactylus flew by flapping its wings, not just by gliding.

Authors is basing the conclusion on drawing similarity between Bats and Sandactylus .Option B talks about: "reinterpreting evidence that had been used to support an earlier theory" what is the earlier theory here ?

Author has drawn an analogy between Bats and Sandactylus and assumed the same logic applies for Sandactylus too .

C is the right answer.

The fact about about Sandactylus: The winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings.

Analogy meaning: a comparison between two things, typically on the basis of their structure and for the purpose of explanation or clarification
Conclusion: Sandactylus flew by flapping its wings, not just by gliding

From the author's statement, There is no theory attached to this from the past fact. Author is trying to compare the two based on the present day known fact and past fact. Hence B

Merged topics. Please, search before posting questions!

Imo C using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon
The author states that fly by flapping wings and the network of blood vessels in the wings are used to disperse heat generated y flapping of the wings.
The author uses this piece of evidence to show that the Sandactylus used similar style for flying.
The network of blood vessels found on the wings of the Sandactylus serves to dissipate heat similar to bat.

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