As for option B,
Quote:
(B) ALH84001 contains PAHs that are the result of nonbiological processes.
, emphasizing that the reading refers to an extra-terrestrial (not from the Earth) phenomenon, the stars, to give an example of the non-organic source, we can safely eliminate this option because it supports that ALH84001 contained PAHs before it landed on Earth.(B) ALH84001 contains PAHs that are the result of nonbiological processes.
>>processes unrelated to organic life can easily produce all the evidence found by McKay’s team
>> The skeptics’ strongest argument: star formation produces PAHs. Moreover, PAHs frequently appear in other meteorites, and no one attributes their presence to life processes.
Skeptics mention that these formation of PAHs could be due to non-biological process and the same thing may have happened in ALH84001?
It may contain PAHs that could be result due to non-biological process ( as it appear in other meteorites)
WHY NOT CORRECT THEN?
Is it because of CONTAINS rather then MAY contain?
IF option B
ALH84001 contains PAHs that maybe the result of nonbiological processes.
Then would have been CORRECT?
Quote:
Option E,
Quote:
(E) The organic molecules found in ALH84001 could not be the result of terrestrial contamination.
on the other hand, implies exactly the opposite of what I described above.
(E) The organic molecules found in ALH84001 could not be the result of terrestrial contamination.
Skeptics claim it could be result due to terrestrial contamination,,
Mc team says : it maybe due to terrestrial contamination on mars,
So organic molecules is due to terrestrial contamination as claimed by scientists
One group of scientists claim it is due to mars land contamination(terrestrial can be for any inner planets – earth, mars etc.)
Others says it is due to earth land contamination
It maybe due to star formation also
So we cannot say “”COULDN’T be results of terrestrial contamination.”
REJECT
IF option E
The organic molecules found in ALH84001 MAY not be the result of terrestrial contamination.Then would have been CORRECT?
Quote:
Note that terrestrial means from the Earth, which we live on. Option C
Quote:
(C) ALH84001 may not have contained PAHs when it landed on Earth.
is a perfect match. If scientists suggest that this meteorite's PAHs might have resulted from terrestrial contamination, that indicates that ALH84001 may not have contained PAHs when it landed on Earth. Note the wording of the option. That is subtle, yet important. It uses "may", claiming the probability, not the certainty
(C) ALH84001 may not have contained PAHs when it landed on Earth.
>> some scientists that its PAHs might have resulted from terrestrial contamination
so maybe it didn’t have PAH but PAHs appear because of earth terrestrial contamination . But this combination can be rejected because
“”concentration of PAHs increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination “”
It means that there was some PAHs before it landed on earth .
But optons says “MAY NOT”
IF OPTION C
ALH84001 doesn’t contain PAHs when it landed on Earth.
Then should be WRONG?
tyildirim92 CrackVerbalGMAT