Final answer:
Photosynthesis and cellular respiration are connected and reciprocal processes that work together to recycle oxygen and store and release energy in living organisms.
Step-by-step explanation:
Photosynthesis and cellular respiration are two processes that are connected and reciprocal in nature. During photosynthesis, plants use carbon dioxide and water to produce glucose and oxygen. In cellular respiration, organisms take in glucose and oxygen to produce carbon dioxide, water, and energy. These two processes work together to recycle oxygen in Earth's atmosphere and store and release energy in living organisms.