You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
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Question: Category: FIREFIGHTING 
Clue: Early NYC firemen were alerted with rattles--so you might have a 3-rattle fire where today we'd have this equivalent

Answer: a 3-alarm fire


Question: Category: "OID" VEY 
Clue: Because it carries 2 sets of chromosomes, a zygote is this type of cell

Answer: diploid


Question: Category: GOING BUGGY 
Clue: Often fatal, Rocky Mountain spotted fever is transmitted by the dog type or Rocky Mountain wood type of this

Answer:
a tick