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 carbon dioxide (CO₂) as a carbon source for their energy needs, which is the only option offered. This process is called photosynthesis, and it is the primary method of energy production for most plants, algae, and some bacteria.