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.

Question

Quizplus · Accepted Answer

Photoautotrophs are organisms that use light as their energy source and carbon dioxide as their carbon source for photosynthesis. Option A is the only one that represents this characteristic. Option B is incorrect because methane is not a carbon source for photoautotrophs, and option C is incorrect because nitrogen gas cannot be used as an energy source. Option D is also incorrect because CO₂ is not an energy source but rather a carbon source.

Photoautotrophs Use