Solved by a verified expert:Which of the following hypotheses can be successfully tested?Snails were the first organisms on Earth to produce energy (ATP) through cellular respiration.Plants were the first organisms on Earth to produce food (carbohydrates) through photosynthesis.Cellular respiration and photosynthesis cannot occur in a closed biological system without each other.Carbon dioxide is consumed by Elodea plants and produced by snails.Elodea plants will increase the carbon dioxide concentration released by snails.Flag this QuestionQuestion 22 ptsHypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.What is the dependent variable to test this hypothesis?amount of carbon dioxide presentamount of oxygen presentnumber of Elodea plantsnumber of snailsamount of lightcolor of bromthymol blueFlag this QuestionQuestion 32 ptsHypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.What is the independent variable to test this hypothesis?amount of carbon dioxide presentamount of oxygen presentnumber of Elodea plantsnumber of snailsamount of lightcolor of bromthymol blueFlag this QuestionQuestion 42 ptsHypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.How is the dependent variable measured to test this hypothesis?amount of carbon dioxide presentamount of oxygen presentnumber of Elodea plantsnumber of snailsamount of lightcolor of bromthymol blueFlag this QuestionQuestion 52 ptsHypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.What is the control to test this hypothesis?Elodea plants in the darkElodea plants in the lightElodea plants with snailsElodea plants without snailsbromthymol blue without plants or snailsFlag this QuestionQuestion 62 ptsHypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.What is the dependent variable to test this hypothesis?amount of carbon dioxide presentamount of oxygen presentnumber of Elodea plantsnumber of snailsamount of lightcolor of bromthymol blueFlag this QuestionQuestion 72 ptsHypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.What is the independent variable to test this hypothesis?amount of carbon dioxide presentamount of oxygen presentnumber of Elodea plantsnumber of snailsamount of lightcolor of bromthymol blueFlag this QuestionQuestion 82 ptsHypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.What is the control to test this hypothesis?Elodea plants in the darkElodea plants in the lightElodea plants with snailsElodea plants without snailsbromthymol blue without plants or snailsFlag this QuestionQuestion 92 ptsWhat would you conclude if the color of the bromthymol blue solution changed in your control tube?error occurred in experiment and needs to be repeatedhypothesis was rejected by the experimental resultshypothesis was supported by the experimental resultsexperiment is not repeatablehypothesis is flawedFlag this QuestionQuestion 102 ptsWithout snails present, you observed carbon dioxide production of Elodea plants in the the light and dark. What can you conclude from these results?Elodea plants do photosynthesis in the light and dark.Elodea plants do cellular respiration in the light and dark.Elodea plants require animals to obtain carbon dioxide for photosynthesis.Elodea plants require animals to obtain carbon dioxide for cellular respiration.Error occurred and the experiment needs to be repeated.