Answer:
False.
Photosynthesis and cellular respiration did not evolve at the same time. Photosynthesis is believed to have evolved before cellular respiration. Photosynthetic organisms, such as cyanobacteria, were among the earliest forms of life on Earth, and they were responsible for producing oxygen through photosynthesis. Cellular respiration likely evolved later as a way for organisms to extract energy from organic molecules, including the oxygen produced by photosynthesis.