GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Oct 2019, 19:25

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

It is theoretically possible that bacteria developed on Mars early in

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Intern
Intern
avatar
B
Joined: 10 Feb 2017
Posts: 47
Location: India
Schools: Rotman '20
GMAT 1: 710 Q49 V37
GPA: 4
GMAT ToolKit User Reviews Badge CAT Tests
Re: It is theoretically possible that bacteria developed on Mars early in  [#permalink]

Show Tags

New post 24 Jul 2019, 09:31
chunjuwu wrote:
It is theoretically possible that bacteria developed on Mars early in its history and that some were carried to Earth by a meteorite. However, strains of bacteria from different planets would probably have substantial differences in protein structure that would persist over time, and no two bacterial strains on Earth are different enough to have arisen on different planets. So, even if bacteria did arrive on Earth from Mars, they must have died out.

The argument is most vulnerable to which of the following criticisms?

(A) It fails to establish whether bacteria actually developed on Mars
(B) it fails to establish how likely it is that Martian bacteria were transported to Earth
(C) It fails to consider whether there were means other than meteorites by which Martian bacteria could have been carried to Earth.
(D) It fails to consider whether all bacteria now on Earth could have arisen from transported Martian bacteria.
(E) It fails to consider whether there could have been strains of bacteria that originated on Earth and later died out.


Note: There are two questions available with the similar stimulus and same first line but different question. The other question (complete the passage) is discussed in: http://gmatclub.com/forum/it-is-theoret ... 46449.html



To negate the conclusion ,we must know on what basis the author has concluded the reasoning.and the assumption made is that all those strains we find are of earth's own ones.and on what basis we say think so?because all "no two bacterial strains on Earth are different enough to have arisen on different planets."

so in order to negate option D AND E look similar, but if we take option E ,we will have to challenge the fact,and its the only rule in CR that FACT CANT BE CHALLENGED.AND WHAT THE CHALLENGE IS ?
THE challenge is if only earth's own bacterias died ,then all possible incoming bacterias other than mars must remain on earth ,leading to a different sets of bacteria presence.and here we are challenging the fact that "no two bacterial strains on Earth are different enough to have arisen on different planets.".so option D is a best choice .
GMAT Club Bot
Re: It is theoretically possible that bacteria developed on Mars early in   [#permalink] 24 Jul 2019, 09:31

Go to page   Previous    1   2   [ 21 posts ] 

Display posts from previous: Sort by

It is theoretically possible that bacteria developed on Mars early in

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne