Whereas in mammals the tiny tubes that convey - GMAT PREP 1

[visitdhiraj]

Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel lines, in
birds the tubes form a random pattern.

(A) Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel
lines, in birds the tubes

(8) Whereas the tiny tubes for the conveying of
nutrients to bone cells are arrayed in mammals
in parallel lines, birds have tubes that

(C) Unlike mammals, where the tiny tubes for
conveying nutrients to bone cells are arrayed in
parallel lines, birds' tubes

(D) Unlike mammals, in whom the tiny tubes that
convey nutrients to bone cells are arrayed in
parallel lines, the tubes in birds

(E) Unlike the tiny tubes that convey nutrients to
bone cells, which in mammals are arrayed in
parallel lines, in birds the tubes

This is a GMAT PREP 1 problem
The OA is A

Could the instructors highlight the mistakes in all the other options?

Regards

Dheeraj

[Willy]

Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel lines, in
birds the tubes form a random pattern.

(A) Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel
lines, in birds the tubes

(8) Whereas the tiny tubes for the conveying of
nutrients to bone cells are arrayed in mammals
in parallel lines, birds have tubes that

(C) Unlike mammals, where the tiny tubes for
conveying nutrients to bone cells are arrayed in
parallel lines, birds' tubes

(D) Unlike mammals, in whom the tiny tubes that
convey nutrients to bone cells are arrayed in
parallel lines, the tubes in birds

(E) Unlike the tiny tubes that convey nutrients to
bone cells, which in mammals are arrayed in
parallel lines, in birds the tubes

This is a GMAT PREP 1 problem
The OA is A

Could the instructors highlight the mistakes in all the other options?

Regards

Dheeraj

Only option A is showing proper comparison.

Option B sounds way too awkward to me.

In option C, D and E

Correct comparison would be UNLIKE X, Y
where X and Y must be parallel.

i.e. Unlike mammals ............ , Birds ......

would be correct construction.

(see highlighted portion for more detail)

[tim]

let us know if there are any other questions on this one..

[zerglingzxzxy]

Hi, dear instructors, i have a question regarding to the parallelism in this question.
In the OG guide, the explanation is that "Whereas introduces two contrasting situations or events and should be followed by parallel structures". However, in thread here(over-75-of-the-energy-produced-in-france-derives-from-t6833.html) the OA in this question does not retain parallelism.
My question is that, when "whereas" appears in a sentence, is it a sign of "absolute" parallelism(the sentence MUST be parallel literally)? Or is it just a sign of "recommend" parallelism(i.e. it's good to be parallel, but it's also OK not to be so)?

Personally i believe it's only recommended to do so based on the two answers.

[RonPurewal]

This question doesn't belong in the general folder. It belongs in the GMAT Prep folder.

Also, this question already exists in the forum.
gmat-prep-1-question-t16798.html

If there are any further questions, post them on the existing thread. Thanks.