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A pheromone is a signal detected as a(n) _____.

User Recamshak
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i think the answer is odor
User Saeed Ghareh Daghi
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It is detected through smell. Pheromones are often secreted as a form of social response and are secreted with the same kind. Different kinds of pheromones can be excreted: we have the sex pheromones, alarm pheromones, and food trail pheromones. 
User Korbi
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