Aflask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights, which are set to cycle between 12 hours of light and 12 hours of dark. the dissolved oxygen concentrations in both flasks are monitored. in which flask will the dissolved oxygen be the highest? a) the flask with the algae. b) there is not enough evidence. c) both flasks will be the same. d) the flask with the water.