Question

6.02- do first a woman decided to see what effects the presence of plants would have on the carbon dioxide levels in a fish tank. in one fish tank, she placed a lot of plants, while the other tank did not have any plants. she measured the production of carbon dioxide in both tanks every 10 minutes for one hour. what results and conclusion would she likely find? the tank without plants would have a lower amount of carbon dioxide due to increased cellular respiration of the fish. the tank without the plants would have a higher amount of carbon dioxide due to decreased cellular respiration of the fish. the tank with the plants would have a higher amount of carbon dioxide due to a lack of photosynthesis of the plants. the tank with the plants would have a lower amount of carbon dioxide due to photosynthesis of the plants.

Explanation:

Plants perform photosynthesis, which uses carbon dioxide ($\text{CO}_2$) as a key reactant, while both fish and plants perform cellular respiration that produces $\text{CO}_2$. In the tank with plants, photosynthesis will consume $\text{CO}_2$, reducing the overall measured amount compared to the tank without plants (where only fish respiration produces $\text{CO}_2$).

Answer:

The tank with the plants would have a lower amount of carbon dioxide due to photosynthesis of the plants.