Scientists conducting experiments with aquatic plants observed the release of gas bubbles in the light

Scientists conducting experiments with aquatic plants observed the release of gas bubbles in the light. What kind of gas and what flowed in the plants that ensure its formation?

The gas that was released is oxygen. These plants were green in color. All green plants are capable of photosynthesis. This complex process is provided by chloroplasts inside cells. The plant absorbs water and carbon dioxide and synthesizes glucose under the influence of sunlight. Oxygen is released as a by-product of the reaction. Photosynthesis takes place in two phases. In the dark, the reaction also occurs, but other reactions operate in the chloroplasts. Thanks to photosynthesis, a pigment, chlorophyll, is released, which gives the plant a green color.