do primary producers harness energy
Autotrophs use solar or chemical energy to produce food. Primary producers are the first producers of energy-rich compounds that are later used by other organisms. The most common primary producers use solar energy to harness photosynthesis - plants. Photosynthesis uses light energy to power chemical reactions that convert carbon dioxide and water into oxygen and sugars or starches. Biologists discovered life deep below the ocean surface on the ocean floor in total darkness.