Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Primary producers are organisms that produce their own food through the process of photosynthesis or chemosynthesis. They form the base of the food chain by converting energy from the sun or chemicals into usable nutrients.
The process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities.
Chemosynthesis: The synthesis of organic compounds within an organism, with chemical reactions providing the energy source.