Final answer:
Photoheterotrophs obtain energy from sunlight but cannot make organic compounds from CO2. They get their carbon source from organic compounds.
Step-by-step explanation:
Photoheterotrophs are organisms that obtain energy from sunlight but cannot make organic compounds from CO2. They get their carbon source from organic compounds. Some examples of photoheterotrophs include purple non-sulfur bacteria, green non-sulfur bacteria, and heliobacteria.