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 used by organisms to communicate with each other for a variety of purposes, including attracting potential reproductive partners. Hormones are internal chemical signals used within an organism to coordinate physiological processes, such as growth, development, and reproduction. Paracrine signals and cytokines are also internal signals involved in cell-to-cell communication and immune responses, respectively. Gametes are reproductive cells involved in sexual reproduction, but they are not signals.