External Chemical Signals That Coordinate Potential Reproductive Partners are Called

Question

External chemical signals that coordinate potential reproductive partners are called
A) hormones.
B) pheromones.
C) paracrine signals.
D) cytokines.
E) gametes.

Accepted Answer

Pheromones are external chemical signals that coordinate potential reproductive partners. Hormones are internal chemical signals that regulate bodily functions. Paracrine signals and cytokines are also chemical signals but they have different functions in the body. Gametes are reproductive cells themselves and do not serve as signals to coordinate mating.