Question

how do photosynthesis and cellular respiration play complementary roles in ecosystems? they have no impact on each other. they have identical functions. they recycle carbon dioxide and oxygen. they compete for resources.

Explanation:

Photosynthesis uses carbon - dioxide and water to produce oxygen and glucose. Cellular respiration uses oxygen and glucose to produce carbon - dioxide and water. They recycle carbon - dioxide and oxygen in ecosystems.

Answer:

They recycle carbon dioxide and oxygen.