It should only be capitalized if it directly precedes a name.
No, coral does not need to be capitalized.
The word evolution does not need to be capitalized.
It does not.
In general, the word "figure" should not be capitalized in a paper unless it is part of a proper noun or title.
No, the word "revivalist" does not need to be capitalized unless it is at the beginning of a sentence or part of a proper noun.
No, because it isnot a propernoun.
No, the word "seismograph" does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
No it does not need to be.
No, the word "motorcycles" does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
No, the word "region" does not need to be capitalized in a sentence unless it is the first word of the sentence or part of a proper noun (e.g. "Pacific Northwest region").
No, the word "present" does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
The word citizen does not need to be capitalized.