The biological significance of pheromones lies in their role as chemical signals that facilitate communication among individuals of the same species. These substances can trigger various behavioral and physiological responses, such as mating, alarm signaling, or territorial marking. Pheromones influence reproductive success, social organization, and group dynamics within animal populations. Their ability to convey information allows for efficient coordination and interaction in both social and solitary species, showcasing the complexity of chemical communication in the natural world.