What are the chemical signals that act between two individuals of the same species?

A) pheromones
B) first messenger
C) second messenger
D) growth factors
E) None of the answer choices are chemical signals that communicate between two individuals of the same species.

Chemical Signals

Molecules released by cells that are used to communicate with other cells, affecting their behavior or physiology.

Pheromones

Chemical signals released by an organism to affect the behavior or physiology of other members of the same species.

First Messenger

A signaling molecule that binds to a receptor on the surface of a cell and triggers a biochemical cascade that conveys signals inside the cell.