Q:Answer the following question given this paragraph: Figure 15.2 All animals that derive energy from food are heterotrophs. The (a) black bear is an omnivore, eating both plants and animals. The (b) heartworm Dirofilaria immitis is a parasite that derives energy from its hosts. It spends its larval stage in mosquitos and its adult stage infesting the hearts of dogs and other mammals, as shown here. (credit a: modification of work by USDA Forest Service; credit b: modification of work by Clyde Robinson). Q: All animals that derive energy from food are classified as what? Choices: - lifeforms - paleotrophs - heliotrophs - heterotrophs A:
A:
heterotrophs