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Not all life depends on energy from sunlight. Microbial life

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Re: Not all life depends on energy from sunlight. Microbial life [#permalink]

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New post 29 May 2016, 10:02
perfectstranger wrote:
Not all life depends on energy from sunlight. Microbial life has been found in bedrock more than five kilometers below the surface of the Earth, and bacteria have been found on the deep ocean floor feeding on hydrogen and other gases rising from the interior of the Earth through vents in the ocean floor.

The statements above, if true, best support which of the following as a conclusion?


(A) The location in the bedrock where microbial life
was found was not near a system of volcanic vents through which hydrogen and other gases rose from the interior of the Earth.
(B) Bacteria are able to exist at the molten center of
the Earth.
(C) A thorough survey of a planet's surface is
insufficient to establish beyond a doubt that the planet contains no life.
(D) Life probably exists on Sun-orbiting comets,
which are cold agglomerations of space dust and frozen gases.
(E) Finding bacterial remains in coal and oil would
establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight.


Can anyone please explain the answer of that question?


The answer is clearly C.
The problem with E is that it concludes that if bacteria is found anywhere ( coal and oil in this instance), it proves that they had been feeding on substances that had not been produced by sunlight. This is not he conclusion of the argument.
Answer choice C clearly captures the essence of the argument i.e. Not all argument depends on sunlight. For evidence - microbial life and bacteria - both examples given of life forms existing not on the surface of the planet.)
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Re: Not all life depends on energy from sunlight. Microbial life [#permalink]

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New post 01 Oct 2016, 22:52
Can some one please explain why E is not the correct answer? Thnx!
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Re: Not all life depends on energy from sunlight. Microbial life [#permalink]

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New post 02 Oct 2016, 12:00
mia90 wrote:
Can some one please explain why E is not the correct answer? Thnx!


There is nothing in the passage that leads to a correlation between finding bacterial remains in coal or oil and feeding on substances produced from sources other than sunlight. If you can explain why you feel that option E can be concluded then we may discuss further.
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Not all life depends on energy from sunlight. Microbial life [#permalink]

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New post 04 May 2017, 08:17
Hi sayantanc2k

Why can't D be the answer ?
"Life probably exists on Sun orbiting comets, which are cold agglomerations of space dust & frozen gases".

The argument concludes that not all life depends on energy from sunlight. It goes on to give an example of Earth.

Is it because the argument gives info only about a "planet" Earth ? So the conclusion can be extended to generalize "planets" ?
Any other reason ?

If it is, aren't we bringing outside information that Earth is a planet ?



ConnectTheDots wrote:
jainmay wrote:
My take: E

Conclusion is " Not all life depends on energy from sunlight" and as per Powerscore Bible, the answer to this question should be related to the conclusion.
Option E, clearly supports that bacteria's have been found in coal and oil and do not require energy from sunlight...

Please correct me if i am wrong... :)


E strengthens the argument. Conclusion should either summarize what is stated in the premises or use the premises as facts to prove a point. E serves as an evidence to support the fact "Not all life depends on energy from sunlight".

C is correct here. It captures the essence of the premises. Since organisms have been found to survive beyond the surface of earth, it could be the case of any other planet as well. Hence, a survey on the surface of any planet is insufficient to ascertain the non-existence of life in that planet.
Not all life depends on energy from sunlight. Microbial life   [#permalink] 04 May 2017, 08:17

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