Question

sb1e. what is the opposite reaction of photosynthesis called?
cellular respiration
the calvin cycle
fermentation
the krebs cycle

Explanation:

Photosynthesis uses carbon - dioxide and water to produce glucose and oxygen using light energy. Cellular respiration uses glucose and oxygen to produce carbon - dioxide, water, and energy (ATP). They are opposite processes. The Calvin cycle is part of photosynthesis. Fermentation is an anaerobic process different from the opposite of photosynthesis. The Krebs cycle is part of cellular respiration but not the overall opposite of photosynthesis.

Answer:

A. Cellular Respiration