Many animals release chemicals that cause highly specific reactions when detected by other members of the species.The chemicals are called:

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Pheromones are chemicals released by animals that trigger specific behaviors or reactions in other members of the species. They are used for communication, mating, territory marking, and many other purposes. Hormones and steroids are also types of chemicals produced by animals, but they act more broadly within the body rather than specifically triggering behaviors in other animals. Protochemicals are not a well-defined term in biology.

Many Animals Release Chemicals That Cause Highly Specific Reactions When