Final answer:
Photosynthesis and cellular respiration both utilize carbon dioxide. Photosynthesis removes carbon dioxide from the atmosphere, while cellular respiration releases carbon dioxide as a byproduct.
Step-by-step explanation:
Photosynthesis and cellular respiration are two processes that utilize carbon dioxide. Photosynthesis removes carbon dioxide from the atmosphere and uses it to make organic compounds, while cellular respiration releases carbon dioxide as a byproduct.
These processes play an important role in the carbon cycle and allow organisms to access life-sustaining energy.