No, coevolution never occurs when two species that have close ecological interactions evolve jointly over time.
Explanation:
The coevolution is the process in which two species evolves together. These species affects each other. In coevolution, species shares close ecological interactions.
The ecological relationship which shows coevolution are parasitism and competition, mutualism. In parasitism one species is negatively affected and the parasite gains the benefit. In competition both species harm each other.
The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
