Which of the following terms is most accurately considered a synonym for photosynthesis?

• A. Carbon fixation
• B. Photoautotrophy
• C. Fermentation
• D. Cellular respiration

Answer: (B)

Verified step by step guidance

1. Understand the definition of photosynthesis: Photosynthesis is the process by which photoautotrophs (like plants, algae, and some bacteria) convert light energy into chemical energy stored in glucose, using carbon dioxide and water as reactants.
2. Analyze the term 'Photoautotrophy': This term refers to organisms that use light ('photo') as an energy source and carbon dioxide as a carbon source to produce organic compounds. This is essentially the process of photosynthesis.
3. Evaluate the term 'Carbon fixation': Carbon fixation is a specific step within photosynthesis where inorganic carbon (CO₂) is converted into organic molecules. While related, it is not a synonym for the entire process of photosynthesis.
4. Consider the term 'Fermentation': Fermentation is an anaerobic process where organisms break down organic molecules to produce energy. This is unrelated to photosynthesis and cannot be considered a synonym.
5. Review the term 'Cellular respiration': Cellular respiration is the process of breaking down glucose to release energy in the form of ATP. It is the opposite of photosynthesis in many ways and is not a synonym for it.