The only dependent clause in the passage: who has done some useful work dies.
ANSWER: The underlined dependent clause in the sentences above acts as adjective clause.
An adjective clause always follows the person, place, thing or situation they describe, begins with a relative pronoun (which, that, who, whom, whose), a relative adverb (where, when, why), or a zero relative and has a verb.
In this case, the dependent clause acts as an adjective clause because it describes the noun in the sentence "Anyone in our ranks", the clause is essential to tell who "anyone in our rank" is. It also begins with a relative pronoun ("who") and has a verb ("is").
