Photoautotrophs Use

Question

Photoautotrophs use
A)light as an energy source and CO₂ as a carbon source.
B)light as an energy source and methane as a carbon source.
C)N₂ as an energy source and CO₂ as a carbon source.
D)CO₂ as both an energy source and a carbon source.
E)H₂S as an energy source and CO₂ as a carbon source.

Accepted Answer

Photoautotrophs use light as an energy source and CO₂ as a carbon source. This process called photosynthesis, converts the energy from sunlight into chemical energy, which is stored in the form of organic molecules such as glucose. The CO₂ is fixed into organic molecules during the Calvin cycle.