Suppose that three samples of water are prepared as described: addition of carbon dioxide, addition of oxygen, and degassed to remove all gases. Three identical Elodea plants are placed in each of these water samples. How will the rate of bubble formation compare in the three samples?

Answer 1

Elodea uses photosynthesis to convert carbon dioxide and water into oxygen and carbohydrate

the most bubbles should be in the carbon dioxide enhanced sample

the degassed sample should have no bubbles

the oxygen enhanced sample should be somewhere in between