Prokaryotes

Prokaryotes

1. Autotroph (self-feeder)

   • Phototrophs (light feeders)
     • Some are photosynthetic (convert light to chemical energy
   • Chemotrophs (chemical feeders)
   • Use CO2 as a source of carbon
   • Chemoautotroph

2. Heterotroph ("other" feeder)

   • AKA Organotrophs (composters)
   • Saprophytes ("dead" feeders)
   • Parasite ("life" eaters)
   • Photoheterotroph/Chemoheterotroph

3. Lithotroph ("rock" feeders)

   • Use inorganic substances such as minerals to meet carbon needs
   • Chemolithotroph/Photolithotroph