AP BIOLOGY

Detailed explanation-1: -Tertiary consumers eat the secondary consumers. They are at the fourth trophic level. In the desert ecosystem, an owl or eagle may prey on a snake. There may be more levels of consumers before a chain finally reaches its top predator.

Detailed explanation-2: -Tertiary consumers are those that eats the secondary consumers (large predators). For example, owls that eat snakes.

Detailed explanation-3: -Primary consumers, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow. At the top of the system are the apex predators: animals who have no predators other than humans.