Figure 39.3
In the territorial behavior of the stickleback fish,the red belly of one male that elicits attack from another male is functioning as a
A)pheromone.
B)sign stimulus.
C)fixed action pattern.
D)hormone.

Question

Figure 39.3
In the territorial behavior of the stickleback fish,the red belly of one male that elicits attack from another male is functioning as a
A)pheromone. 
B)sign stimulus. 
C)fixed action pattern. 
D)hormone.

Quizplus · Accepted Answer

The red belly of one male stickleback fish acts as a sign stimulus, triggering the aggressive behavior of another male. It is not a pheromone, fixed action pattern, or hormone.

Figure 39.3 In the Territorial Behavior of the Stickleback Fish,the Red Belly