Which definition best fits a pheromone?
Answer
A chemical signal carrying information between members of the same species
Explanation
A **pheromone** is defined in the slides as a chemical signal that carries information from one individual to another member of the **same species**. It is not restricted to blood-borne hormonal communication, vocalizations, or receptors. Examples include sex attractants and alarm substances.\n\n**Key takeaway:** Pheromones are chemical messages exchanged within a species.\n\n**Glossary:** **Intraspecific**: Occurring among members of the same species; **pheromone**: A chemical signal used in such communication.
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