Multiple Choice
In such a pond that contains algae and fish, what is happening to the oxygen?
A) Oxygen is only produced by the algae
B) Oxygen is only consumed by the fish
C) Oxygen is only consumed by both the algae and the fish
D) Oxygen is produced by the algae, and consumed by the algae and the fish
Correct Answer:

Verified
Correct Answer:
Verified
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