Photosynthesis and cellular respiration exchange carbon and oxygen in the ecosystem.
Step-by-step explanation:
Plants carry out photosynthesis by which they produce oxygen and consume carbon-di-oxide. This oxygen is inhaled by the humans and animals and they breathe out carbon-di-oxide. Cellular respiration takes in oxygen and gives out carbon-di-oxide.
Cellular glucose is taken from photosynthesis by the cellular respiration to produce ATP.In photosynthesis, water breaks down which produces oxygen and in cellular respiration, water is formed by combining oxygen and hydrogen. Thus, both these processes are building blocks of ecosystem keeping levels of oxygen and carbon-di-oxide stable levels.