1. Cyanobacteria can fix CO2. 2. All bacteria that can fix CO2 will produce glucose as the end product of photosynthesis. 3. Bacteria that get energy from organic compounds are called heterotrophs. 4. Photoautotrophs are bacteria which get their energy from sunlight. 5. Chemotrophic autotrophs can use inorganic compounds such as sulfides and use them as a source of energy. Solution 1. Cyanobacteria can fix CO2. 2. All bacteria that can fix CO2 will produce glucose as the end product of photosynthesis. 3. Bacteria that get energy from organic compounds are called heterotrophs. 4. Photoautotrophs are bacteria which get their energy from sunlight. 5. Chemotrophic autotrophs can use inorganic compounds such as sulfides and use them as a source of energy..