Question

Select the letter of the term that identifies the phrase in parentheses in the following sentence: Artificial blood serum may soon be made (with potato protein).

a. prepositional phrase
b. appositive phrase
c. participial phrase
d. gerund phrase
e. infinitive phrase

Answer 1

The phrase with potato protein is a A. prepositional phrase, since it begins with the word with, which is a preposition. 
An appositive phrase would be separated with commas, a participial and gerund phrase would have the form verb + ing (making...), and infinitive phrase would have an infinitive (to make).