if carbon dioxide and water were abundantly available to a heterotrophic prokaryotic cell, would it be possible for the cell to use them as a food source?
sunlight would be needed for the reaction to occur, so they would not be a food source.
neither carbon dioxide nor water contains energy the cell could use, so they would not be a food source.
since carbon dioxide and water are used to make glucose, they could be used as a food source.
anything that contains carbon is an organic molecule, so the carbon dioxide could be a food source.