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The greatest Probability for the existence of extraterrestrial life is

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The greatest Probability for the existence of extraterrestrial life is  [#permalink]

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New post 26 Jul 2018, 22:46
1
00:00
A
B
C
D
E

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  35% (medium)

Question Stats:

63% (01:26) correct 38% (01:32) wrong based on 120 sessions

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The greatest Probability for the existence of extraterrestrial life is on a planet beyond our solar system. The Milky Way galaxy alone contains 100 billion other suns, many of which could be accompanied by planets similar enough to Earth to make them suitable abodes of life.

The statement presupposes which of the following?


A. Living creatures on another planet would probably have the same appearance as those on Earth.

B. Life cannot exist on other planets in our solar system.

C. If the appropriate physical conditions exist, life is an inevitable consequence.

D. It is likely that life on another planet would require conditions similar to those on Earth

E. More than one of the suns in the galaxy is accompanied by an Earth-like planet.
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Re: The greatest Probability for the existence of extraterrestrial life is  [#permalink]

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New post 26 Jul 2018, 23:49
Are you sure about the OA? Would you please provide the OE and the source of the question?

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The greatest Probability for the existence of extraterrestrial life is  [#permalink]

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New post Updated on: 27 Jul 2018, 02:32
In stating that planets may exist that are similar enough to Earth to make them suitable for
supporting life, the author implicitly rules out planets dissimilar to Earth as likely to support life.
The assumption underlying the statement is that life on another planet is likely to require
conditions similar to those on Earth. Therefore, D is the correct answer.



A is not correct. The statement presupposes nothing about the appearance of extraterrestrial
life.

B is incorrect. The statement implies that it is relatively unlikely that life exists on other
planets in our solar system, but it makes no presupposition absolutely ruling out the possibility
that such life exists.

The answer choice of C is incorrect. Although the statement suggests that
there is the greatest chance for life when physical conditions are appropriate, it leaves open
the possibility that no life will exist even with appropriate conditions.

E is also incorrect. The statement says that it is possible that more than one of the suns in the galaxy is accompanied
by an Earth-like planet, but it does not presuppose that there are actually any such suns.

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Originally posted by AshutoshB on 26 Jul 2018, 23:59.
Last edited by AshutoshB on 27 Jul 2018, 02:32, edited 1 time in total.
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Re: The greatest Probability for the existence of extraterrestrial life is  [#permalink]

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New post 27 Jul 2018, 00:42
AshutoshB wrote:
In stating that planets may exist that are similar enough to Earth to make them suitable for
supporting life, the author implicitly rules out planets dissimilar to Earth as likely to support life.
The assumption underlying the statement is that life on another planet is likely to require
conditions similar to those on Earth. Therefore, E is the correct answer.



A is not correct. The statement presupposes nothing about the appearance of extraterrestrial
life.

B is incorrect. The statement implies that it is relatively unlikely that life exists on other
planets in our solar system, but it makes no presupposition absolutely ruling out the possibility
that such life exists.

The answer choice of C is incorrect. Although the statement suggests that
there is the greatest chance for life when physical conditions are appropriate, it leaves open
the possibility that no life will exist even with appropriate conditions.

D is also incorrect. The statement says that it is possible that more than one of the suns in the galaxy is accompanied
by an Earth-like planet, but it does not presuppose that there are actually any such suns.

Hit Kudos


Hi! you have incorrectly marked the OA as D. E should be the answer.
Please rectify this error.

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Vaibhav
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Re: The greatest Probability for the existence of extraterrestrial life is &nbs [#permalink] 27 Jul 2018, 00:42
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The greatest Probability for the existence of extraterrestrial life is

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