Answer:
Tiny organisms. Hope this helps!
Explanation:
Answer: Blueberries have anthocyanins, water-soluble vacuolar pigments. Depending on their pH, they can appear in colors such as red,purple; etc. Because anthocynanins absorb UV light, they have this dark blue/purple color.
The Elodea then takes in the carbon dioxide, and produces the oxygen for the snail to take in. ... The amount of Bromthymol Blue in each test tube was important because it shows how much carbon dioxide they are producing. If the color changed, it meant that there was carbon dioxide in the test tube. Please mark brainlest