DENDROLOGY

Detailed explanation-1: -Thus, water (H2O) is the source of oxygen released during photosynthesis.

Detailed explanation-2: -Oxygen is released due to the photolysis of water. Sunlight helps in splitting up of the water molecules thereby releasing oxygen.

Detailed explanation-3: -The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

Detailed explanation-4: -Photosynthesis is the process by which green plants synthesize glucose by utilizing carbon dioxide and water in the presence of chlorophyll and sunlight. The splitting of water H2O molecules into a hydrogen ion H+ and hydroxide ions OH occurs during photolysis. These hydroxide ions OH react to produce oxygen gas O2.