Final answer:
Intercellular signaling occurs between cells of the same species, while intracellular signaling occurs within cells.
Step-by-step explanation:
Intercellular signaling occurs between cells of the same species, while intracellular signaling occurs within cells. Intercellular signaling involves the release of signaling molecules from a signaling cell that then bind to receptors on a target cell, initiating a response. Intracellular signaling, on the other hand, involves signal transduction events that occur within the cell, usually in response to the binding of a ligand to a receptor on the cell membrane or in the cytoplasm.