SC Flies

Question

https://i2.photobucket.com/albums/y29/Tony_hk/SC2-28.jpg

What's wrong with (D)

GMAT TIGER · Answer

C. Which is require here to modify courtship.

In D, them modifying phrase modifies the whole clause but it should only modify courtship because courtship assists flies to test hydrocsarbons ................................

zonk · Answer

E for me.

You don't need "those of" at the end.

"to distinguish their species from others."

those of others implies you're distinguishing from a specific thing associated with species. here, you're just distinguishing one species from another.

LoyalWater · Answer

E for me. distinguish species from those of others is awkward.

It should end with "distinguish their own species from others. "

stallone · Answer

A :

lemme write what i feel wrong in others :

B "when they" this is not required , making wordy , also " those " is plural which is wrong as species is singular

C "being" not required , making passive

D "those"

E "from" it shud be from that of others ; u cannot compare "species" to " others "

ventivish · Answer

For me the Answer should be A

The choice for me was between A and E, But you would distinguish one species (singular) from  that  of others.

Also the phrase 'and apparently this assists...', modifies the phrase 'Hydrocarbons, with which fruit flies perfume themselves.....,  are  known to be important in courtship,'
Also  are  refers to Hydrocarbons and would require a noun modifier,'apparently assisting' in choice E is an adverbial modifier.

winnie · Answer

E for me.
D is wrong because the correct idiom should be "assist...in doing...."

LM · Answer

hydrocarbons don't assist the flies in the process of tasting.....

hydrocarbons assist those flies which taste........

Therefore it should be "E".

A and B are ruled out because of the wrong usage of the conjunction "and"

C has incorrect reference , "which".

x2suresh · Answer

Idiom --distinguish X from Y. X and Y must be parall. D) Distinguish their own species from those of others others=other species. you are comparing "Species" with "Those of Species" --> Those refer to what??? eyes, legs,, hands.. :lol:

D is incorrect E ) Distinguish their own species from others (other species) C -- which incorrectly modifies "courtship" -- > courtship is not assisting flies.. A and B.. --> conjuction "and" mislead that "Hydrocabons assiting flies to .." "Fruit flies perfuming themselves with specific species blends with Hydrocarbons " ------------> this is assisting...flies to ..

nmohindru · Answer

IMO E)

You dont need "and" so A) and B) goes

"which" is wrong in C)

In D) "those of others" is wrong

judokan · Answer

Still confused about the "those" in D.

Can I say that?

distinguish their species from those of others (where those means "the species)
Is it a correct idiom? or it is only not ll?

BTW, is species plural?

OA is E

x2suresh · Answer

Distinguish Apples from Oranges
Distinguish White Apples from Other Apples
Distinguish White Apples from Others (Here its clear Others --Other Apples)

Distinguish White Apples from those of Others ( those of Other Apples --> those represents what.)

Distinguish  Leaves of Apples  from  those of Oranges

Is it clear now?

judokan · Answer

Thanks x2,

I understand your examples. Nice ones.

(1) For all below, the subject you are comparing is the apple itself. So you do not need “that/those”
Distinguish Apples from Oranges
Distinguish White Apples from Other Apples
Distinguish White Apples from Others (Here its clear Others --Other Apples)

(2) While, the following example compares the leaves of apple and leaves of orange. So, we need “those” here.
 Distinguish Leaves of Apples from those of Oranges

very clear.

But my problem is that I think the question I posted is more relevant to (2). We are not comparing the species of the flies, rather than the flies themselves …

Do I have any logic problem here?

BTW, is species plural? What is the singular form?

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