Light
Jan Ingenhousz
He proved that Priestley's experiment only worked when plants were exposed to sunlight. Concluding that Priestley had not performed his experiment without sunlight. Ingenhousz performed both in sun and dark presence.
Only in the presence of light
Priestley's and Ingenhousz's experiments showed that light is necessary for plants to produce oxygen.
Jan Ingenhousz concluded from his experiments that all plants need sunlight to produce energy. He also concluded that plants underwater only produce oxygen bubbles when they have access to sunlight.
Light
Priestley's and Ingenhousz's experiments showed that light is necessary for plants to produce oxygen (right from the text book of "Prentice Hall Biology" Page 206 by Miller Levine).
the hydrilla produce bubbles when added baking soda because, the bubbles are the oxygen that the hydrilla produce, while it undergoes the process of phtosynthesis in the water.
Jan Ingenhousz was a Dutch scientist who discovered the process of photosynthesis. He showed that plants release oxygen in the presence of sunlight and carbon dioxide, and he also demonstrated that plants need sunlight to produce energy. Ingenhousz's work laid the foundation for our understanding of how plants convert sunlight into chemical energy.
You can not see photosynthesis but you can see its results. Algae in water exposed to sunlight will give off bubbles. These bubbles are made of Oxygen gas. The Oxygen is a waste product of the photosynthesis process.
Because when exposed to heat, all the bubbles in the soda do something with oxygen and the oxygen goes into the air, so that's how I guess.
Priestley's and Ingenhousz's experiments showed that light is necessary for plants to produce oxygen (right from the text book of "Prentice Hall Biology" Page 206 by Miller Levine).