•  Describe the biomolecules used in creating energy for autotrophs and heterotrophs (origins and destinations). 
  • Discuss the interdependence of autotrophic and heterotrophic life forms  (depicting the flow of a carbon atom from the atmosphere, to a leaf, through the food).
  • Explain how carbon compounds are gradually oxidized to provide energy in the form of adenosine triphosphate (ATP), which drives many chemical reactions in the cell.
  • Analyze how manipulation of certain variables can affect the rate of photosynthesis and cellular respiration.