Producers can build complex food molecules that are jam-packed with energy. Most producers
are photosynthesizers, using energy from sunshine to make food in a process called
Chemosynthesizers are producers that use energy from chemicals like nitrogen, sulfur and iron to
make food molecules.
A series of chemical reactions that transform water and carbon dioxide into sugar (glucose) and
oxygen. The initial "light" reactions are produced by solar energy. Occurs in all green
plants and in some bacteria and protists.