hi guys
this sentence has been already discussed, but i am not happy with explanation, can somebody elucidate it in details
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.
A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth of mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
oa is E
recently documented examples
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- Salman Ghaffar
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Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.
A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth of mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
A-Wrong- because the phrase "when placed....." does not tell what's placed in a stimulating environment
B-Wrong- because "mice" and "canaries" are not examples of neurogenesis - the growth in their brains & neorons is.
C-Wrong - because "mice's brains" and "canaries' neurons" are not examples of neurogenesis.
D-Wrong - because "the brain growth of mice when placed ..." does not tell us what's placed in a stimulating environment
E-Correct. "brain growth" and "increase in neurons" are the correct examples of neurogenesis.
A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth of mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
A-Wrong- because the phrase "when placed....." does not tell what's placed in a stimulating environment
B-Wrong- because "mice" and "canaries" are not examples of neurogenesis - the growth in their brains & neorons is.
C-Wrong - because "mice's brains" and "canaries' neurons" are not examples of neurogenesis.
D-Wrong - because "the brain growth of mice when placed ..." does not tell us what's placed in a stimulating environment
E-Correct. "brain growth" and "increase in neurons" are the correct examples of neurogenesis.
- Isaac@EconomistGMAT
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Answer A: The relative pronoun 'when' should refer to a time; here it wrongly refers back to mice (the noun it is next to); mice should be replaced by the relative pronoun 'that' or 'which' (the latter in independent clauses, the former in dependent ones[as is the case here]).
Answers B and C : As already stated in the thread- the mice and canaries or their brains are not the examples; you are looking for a process here.
Answer D: Same as A; the wrong use also creates ambiguity; 'they' at the end can be seen as ambiguous, relating back to more than one plural noun. The 'when they' is also wordy/redundant.
Answer E: Correct use of the relative pronoun that to clearly refer back to mice and both examples are proper examples showing the process of neurogenesis.
Answers B and C : As already stated in the thread- the mice and canaries or their brains are not the examples; you are looking for a process here.
Answer D: Same as A; the wrong use also creates ambiguity; 'they' at the end can be seen as ambiguous, relating back to more than one plural noun. The 'when they' is also wordy/redundant.
Answer E: Correct use of the relative pronoun that to clearly refer back to mice and both examples are proper examples showing the process of neurogenesis.
Isaac Bettan
Academic Director
Master GMAT
https://econgm.at/EconomistGMAT
[youtube]QBNZczg84tU[/youtube]
Academic Director
Master GMAT
https://econgm.at/EconomistGMAT
[youtube]QBNZczg84tU[/youtube]