Heterotrophs

Definition

Heterotrophs are organisms that obtain their energy by consuming other organisms, rather than producing it themselves through photosynthesis or chemosynthesis. They rely on organic carbon for growth and energy needs.

5 Must Know Facts For Your Next Test

1. Heterotrophs include animals, fungi, and many bacteria.
2. They cannot produce their own food and must ingest or absorb nutrients from other sources.
3. Heterotrophs play a crucial role in the food chain by acting as consumers.
4. They depend on autotrophs (organisms that produce their own food) either directly or indirectly for nutrients.
5. Decomposers like fungi and certain bacteria are heterotrophs that break down dead organic material.

Review Questions

• What distinguishes heterotrophs from autotrophs?
• Name three types of organisms that are considered heterotrophs.
• Why are heterotrophs important in the ecosystem?

Related terms

Autotrophs: Organisms that produce their own food through photosynthesis or chemosynthesis.

Photosynthesis: The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.

Food Chain: A hierarchical series of organisms each dependent on the next as a source of food.