Pheromones are example of :
[UK Lower PCS 2021]
1) Growth hormones
2) Endohormones
3) Ectohormones
4) None of the above
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Pheromones are chemical signals that have evolved for communication between members of the same species. A pheromone signal elicits a specific reaction in the receiver, for example, a stereotyped behavior (releaser effect) or a developmental process (primer effect).
3) Ectohormones