PROTIST
While many protists multiply through binary fission, they can also utilize Conjugation. This happens when chemical signals (gamones) are given or exchanged before a pair of protists unite in conjugation. It is not known if these gamones should be considered as sex pheromones, reminiscent of those known in many animals (for example, certain insects), but they seem to serve the similar purpose of attracting or bringing together different mating types.