In His Research with Stickleback Fish, Tinbergen Observed That a Distinctive

Multiple Choice

In his research with stickleback fish, Tinbergen observed that a distinctive pattern of mating behaviours was initiated in the spring as the temperature of the water increased. Ethologists refer to the rising water temperature as a(n) :

A) innate releasing mechanism or sign stimulus.
B) fixed action pattern.
C) discriminative stimulus.
D) reinforcer.