How has the use of water in photosynthesis affected biological evolution?

As a result of the photolysis of water, oxygen is released as a by-product. This led to the creation of the Earth’s oxygen atmosphere, and, consequently, to the possibility of aerobic respiration (more effective). In addition, in the upper atmosphere, oxygen is converted into ozone, an ozone screen is created that protects against ultraviolet radiation, which made it possible for plants and animals to land.

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