A student is attempting to study whether or not an organism is capable of performing both photosynthesis and respiration in an aquatic environment. Which of the following would be the preferred experimental setup?
a. a plant placed in a lighted aquatic tank and dark aquatic tank. pH levels monitored as an indication of CO2 levels
b. a plant placed in a lighted aquatic tank and a fish placed in a lighted aquatic tank. pH levels monitored as indication of CO2 levels
c. a fish placed in a lighted aquatic tank and a dark aquatic tank. pH levels monitored as an indication of CO2 levels
d. a fish placed in a lighted aquatic tank and a plant placed in a dark aquatic tank. pH levels monitored as an indication of CO2 levels
Answer: A