Discussion
An organism that can synthesize all its required organic components from CO2 using energy from the sun is a:
Answer: A
Correct answer: photoautotroph
The name states both halves: photo- for light as the energy source, autotroph for CO2 as the carbon source. Plants, algae and cyanobacteria are photoautotrophs. A photoheterotroph uses light but needs organic carbon; a chemoautotroph fixes CO2 using energy from inorganic chemical oxidations.
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