Most bacterial populations grown in controlled conditions will quickly

Question

Most bacterial populations grown in controlled conditions will quickly expand to the limit of the food supply,  produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time.

(A) produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time.

(B) will have produced toxic waste products that inhibit further growth and also will reach an equilibrium state within a relatively short time.

(C) will then produce a toxic waste product that inhibits further growth and thus reached an equilibrium state in a very short time.

(D) produce toxic waste products that inhibit further growth, and reach equilibrium.

(E) produce toxic waste products that inhibit further growth, and reach an equilibrium state in a fairly prompt way.

Source:  Master GMAT

Stonely · Answer

Hey now, this question really bothers me. In the GMAT format answer A is always leave the sentence as is. So in this question produced turns to produce in answer A. So is my assumption correct or was this a typo? If my assumption is correct can we stick to it in the forum? I use the assumption to save time not rereading answer A.

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philipssonicare · Answer

Stonely 
It is the same. 'A' merely has a typo. In the future, press the 'Report a Problem' button and ask the mods to fix

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Most bacterial populations grown in controlled conditions will quickly expand to the limit of the food supply,  produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time .

(A) produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time.
 expand ... produced ....and  reached 
 Expand  ends in a D, but it is not a past participle. It is simple future tense with  will...expand . The  will  carries over to the others, but is not shown because of ellipsis.

Since  expand  is not underlined, the others must follow

simple future+  will  past participle+  will  past participle (x)

(B) will have produced toxic waste products that inhibit further growth and also will reach an equilibrium state within a relatively short time.
 expand ... produced ....and  will reach 
Simple future+ will  past participle+ simple future (with  will  unnecessary added again into the list) (x)

(C) will then produce a toxic waste product that inhibits further growth and thus reached an equilibrium state in a very short time.
 will expand...will produce...and...reached 
simple future +  will  simple future + 'no  will ' past participle

(D) produce toxic waste products that inhibit further growth, and reach equilibrium.
(E) produce toxic waste products that inhibit further growth, and reach an equilibrium state in a fairly prompt way.
 expand...produce...reach . Nice parallelism
The  quickly  carries through to each verb, just as  will  does.  quickly...in a fairly prompt way  is redundant

D

ayushgmatclub1 · Answer

How did you know that the "quickly" word is also being carried along with "will". If we just carry will (because we have no indication that the production of toxic waste is also being done quickly) then E option stands correct. Please let me know if I'm wrong.

Thanks!

Sajjad1994 · Answer

Official Explanation

The three verbs in parallel are:  “will expand,” “(will) produce,”  and  “(will) reached.”  This shows the original error. Also, the adverb  “quickly”  will carry forward to all three verbs.

(B)  fails for introducing a  “have”  for  “produced.”

(C)  fails to correct the  “reached”  and adds a gratuitous  “then.”

(E) ’s addition of  “fairly prompt way”  is an error, for level of usage.

(D)  corrects the  “reached”  and drops the unneeded time of equilibrium, and the redundant  “state.”

The correct answer is (D).

Lok2209 · Answer

Hey sajid

what is the source of this question?
please correct me if i am wrong, i dont see any parallelism sets here ?
more over i find causality here ? i mean reaching equilibrium is not something that bacteria does right? it is the consequence of two opposite action right?
please help me

thanks

parasma · Answer

Most bacterial populations grown in controlled conditions will quickly expand to the limit of the food supply, produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time.
 
Very first- equilibrium is it self a state so using state with equilibrium is redundant.

All answer except D is correcting this error.

Second- will is used for all verb tense so Expand, produce and reach are parallel.

Third- Quickly is modifying only expand not other verbs.

(A) produced toxic waste products that inhibit further growth, and reached an equilibrium state within a relatively short time.

(B) will have produced toxic waste products that inhibit further growth and also will reach an equilibrium state within a relatively short time.

(C) will then produce a toxic waste product that inhibits further growth and thus reached an equilibrium state in a very short time.

(D) produce toxic waste products that inhibit further growth, and reach equilibrium.

(E) produce toxic waste products that inhibit further growth, and reach an equilibrium state in a fairly prompt way.

Most bacterial populations grown in controlled conditions will quickly

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