AP BIOLOGY

Detailed explanation-1: -Primary consumers make up the second trophic level. They are also called herbivores. They eat primary producers-plants or algae-and nothing else.

Detailed explanation-2: -Second Level Secondary consumers get their energy from primary consumers and herbivores in their ecosystems. For example, a toad living in the woods eats grasshoppers and other insects. On an African savannah, lions feed on giraffes and antelope.

Detailed explanation-3: -These are: Primary consumers (herbivores)-plant eaters (e.g. a cow). Secondary consumers (carnivores)-meat eaters (e.g. a lion) and omnivores. Tertiary consumers (omnivores)-plant and animal eaters (e.g. humans or birds). Decomposers-organisms that break down dead organic material (e.g. fungi).

Detailed explanation-4: -Herbivores belong in the second level of the trophic system. Called primary consumers, herbivores eat only plants and algae as their sources of energy. Herbivores cannot manufacture their own food.

Detailed explanation-5: -Primary consumers are herbivores. Herbivores eat plants, algae, and other producers. They are at the second trophic level. In a grassland ecosystem, deer, mice, and even elephants are herbivores.