Question

What organisms use carbon dioxide as the source of their carbon?

Answer 1

Heterotrophic organisms use organic compounds —usually from other organisms — as carbon sources. Autotrophic organisms use carbon dioxide (CO2) as their only or main source of carbon. Many autotrophic bacteria are photosynthetic and get their carbon from the carbon dioxide in the atmosphere.

Answer 2

Answer:

Autotrophic organisms (chemosynthetic and photosynthetic bacteria, algae, and plants) derive this essential element from carbon dioxide.