Compare and contrast the processes of photosynthesis and cellular respiration. explain at least two similarities and two differences between the two.

Both involve in production of energy, both involve the exchange of gases , And both the process takes place in cell organelle which was considered as endosymbiotic organism. They are chloroplast and Mitochondria, Photosynthesis takes place in Chloroplast where as respiration takes place in mitochondria.
At critical condition both have alternate pathway.