What is the difference between oxygenic and anoxygenic photosynthesis? Which form of photosynthesis does photolysis occur in? How are aerobic, anaerobic, and photosystems related? How does anaerobic PS I use non-cyclic photolysis, while anaerobic PS II use cyclic photolysis if photolysis only occurs in non-cyclic phosphorylation and not in cyclic phosphorylation?