Biologists Categorize the Cue That Stimulates Young Herring Gulls to Peck

Multiple Choice

Biologists categorize the cue that stimulates young herring gulls to peck as a sign stimulus because the pecking behavior ____.

A) requires learning to perfect
B) is a cue released by the baby gulls to their parents
C) is triggered by presentation of the cue
D) is only triggered by the cue if it is accompanied by species-specific behaviors
E) appears both in the presence and absence of the cue