Weegy: Aggressive behavior leads to fights that allow strong animals kill off weaker members of the species. -does not describe a function of aggressive animal behavior. User: In ferns, the plant structure that produces sperm and egg cells is shown as which of the following? Weegy: In ferns, the plant structure that produces sperm and egg cells is known as Gametophyte. User: Sadie is demonstrating a learned behavior that she acquired what method? (More)