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Aflask of duckweed in water is placed under lights on a 12-hour light, 12-hour dark cycle, next to a control flask containing only water. assuming there is no change in water temperature, which flask will have the lowest dissolved oxygen (do) concentration, at what time? a. do will always be lower in the flask with duckweed compared to the control. b. do will always be higher in the flask with duckweed compared to the control. c. the flask with duckweed will have the lowest do at the end of the dark cycle and the highest do at the end of the light cycle. d. do will be the same between the control and the duckweed-containing flask.
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Aflask of duckweed in water is placed under lights on a 12-hour light, 12-hour dark cycle, next to a...
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