The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3In such a pond that contains algae and fish, what processes are happening?
A. Only cellular respiration is happening, carried out by both the algae and the fish
B. Only photosynthesis is happening, carried out by the algae
C. Both photosynthesis (carried out by the algae) and cellular respiration (carried out by the fish) are happening
D. Both photosynthesis (carried out by the algae) and cellular respiration (carried out by both the algae and the fish) are happening
Answer: D
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