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Sentence Correction: Comparatives - As vs. Like

The Giant Panda is threatened by the degradation of its montane habitat by cultivation, and after a gestation period that averages 135 days, only gives birth to a small amount of young, as most large mammals do.

Incorrect.

This answer choice is grammatically incorrect. The article amount of can describe non-count nouns only whereas the noun young is a count noun.

What helps us identify this mistake is the following Stop Sign:

much, (a) little, less, the amount of

Incorrect

This answer choice is grammatically incorrect and repeats the original Parts of Speech error. The article amount of can describe non-count nouns only whereas the noun young is a count noun.

What helps us identify this mistake is the following Stop Sign:

much, (a) little, less, the amount of

Incorrect

Although this answer choice corrects the original Parts of Speech error by using the correct article number of, it is grammatically incorrect. A comparative section beginning with as should always include a conjugated verb. The comparative section in this answer choice (as most large mammals), however, does not include a verb.

[[snippet]]

Incorrect

Although this answer choice corrects the original Parts of Speech error by using the correct article number of, it is grammatically incorrect. The like section should not include a conjugated verb. In this answer choice, however, the like section includes a conjugated verb (like most large mammals do).

[[snippet]]

Great job!

The article amount of can describe non-count nouns only whereas the noun young is a count noun. This answer choice corrects this Parts of Speech error by using the correct article number of.

The Giant Panda is threatened by the degradation of its montane habitat by cultivation, and after a gestation period that averages 135 days, only gives birth to a small amount of young, as most large mammals do
The Giant Panda is threatened by the degradation of its montane habitat by cultivation, and after a gestation period that averages 135 days, only gives birth to a small number of young, as most large mammals
The Giant Panda is threatened by the degradation of its montane habitat by cultivation, and after a gestation period that averages 135 days, only gives birth to a small number of young, as most large mammals do
Threatened by the degradation of its montane habitat by cultivation, the Giant Panda, after a gestation period that averages 135 days, only gives birth, like most large mammals do, to a small number of young
Threatened by the degradation of its montane habitat by cultivation, the Giant Panda, after a gestation period that averages 135 days, only gives birth, as most large mammals do, to a small amount of young