Comparison

[sonu_gmat]

These are two SC's discussed in the forum but still I need to clear some doubt.

rice has protein of higher quality than that in wheat. (Correct as per OG)
rice has a protein higher in quality than that in wheat.(Correct as per OG)
wild animals have less total fat than that of livestock. (As per previous MGMAT explanation this is wrong since 'that' refers to 'fat' and we need to compare b/w wild animal and live stock)

If the last one is constructed in the following way will it be correct.
wild animals have total fat less than that of livestock. (even though 'of live stock' looks problematic to me) I guess now we are comparing 'total fat' with 'total fat'.

[JonathanSchneider]

Your fix helps the comparison, though it still might not be the best choice, for issues of clarity. You use "that" as a "new copy" pronoun. Were you to simply use the antecedent again, you would have:

"Wild animals have total fat less than the total fat of livestock."

I think we can agree that this is unnecessarily wordy, right? Inserting the pronoun "that" elliminates the repetition of "total fat," but it does not totally fix the wordiness. A much better version is simply:

"Wild animals have less total fat than do livestock."

[sonu_gmat]

1. '....than him' and '....than he (is)'. Are both of these correct?
e.g. X is taller than him / X is taller than he

2. A new rocket will be able to deliver heavier load to ... than space shuttle.
As per OG this is an incorrect comparison. 'can' should follow shuttle to make it correct.

Is it necessery to put verb/aux after the subject of the second part of the sentence to make the correct comparison.

[RonPurewal]

1. '....than him' and '....than he (is)'. Are both of these correct?
e.g. X is taller than him / X is taller than he

this should be "taller than he".

i hate this, but that's the rule.

i very much doubt that you will be tested on this sort of thing. as in, i would place a VERY LARGE wager that you won't be tested on it.

--

2. A new rocket will be able to deliver heavier load to ... than space shuttle.
As per OG this is an incorrect comparison. 'can' should follow shuttle to make it correct.

Is it necessery to put verb/aux after the subject of the second part of the sentence to make the correct comparison.

you only need the "verb/aux" if the sentence is ambiguous without it.

for instance:
i know more about shakespeare than my brother --> ambiguous. this could mean (a) i have more knowledge of shakespeare than my brother has, or (b) i know more about shakespeare than i know about my own brother.

if i mean (a), then i write:
i know more about shakespeare than does my brother
or
i know more about shakespeare than my brother does.

note that the first of these (aux verb BEFORE noun) is perfectly acceptable. in fact, if the noun is followed by a modifier, then you MUST place the aux verb BEFORE the noun.
examples:
i know more about shakespeare than my brother, who has never studied english literature, does --> INCORRECT
i know more about shakespeare than my brother does, who has never studied english literature --> INCORRECT
i know more about shakespeare than does my brother, who has never studied english literature --> CORRECT