According to the heterotroph hypothesis, autotrophs were able to evolve because heterotrophs made conditions more favorable by:
A. producing chlorophyll for plants.
B. adding carbon dioxide to the environment.
C. manufacturing food from carbon dioxide and oxygen.
D. storing energy in the bonds of inorganic compounds.
Heterotrophs developed the ability to break down glucose, releasing the energy found within. In this process, carbon dioxide is released as a waste product. Autotrophs were able to use this waste gas in photosynthesis.