Which Best Describes a Photoautotroph

Question

Which best describes a photoautotroph?
A)Utilizes sunlight for energy and organic molecules as a carbon source.
B)Utilizes sunlight as an energy source to fix carbon dioxide.
C)Emits light from the breakdown of organic carbon.
D)Emits light from the fixation of carbon dioxide.
E)Uses organic compounds as a source of carbon and energy.

Accepted Answer

A photoautotroph is an organism that uses sunlight as an energy source to fix carbon dioxide into organic carbon compounds. This process is known as photosynthesis. Therefore, option B is the best choice. Option A is incorrect because it describes a photoheterotroph. Option C and D are incorrect because they describe chemiluminescent organisms that emit light, which is not related to photosynthesis. Option E is incorrect because it describes a chemoheterotroph.