What Is a Possible Reason for Oxygen to Be So

question 36

Multiple Choice

What is a possible reason for oxygen to be so low by the end of the night?

• A)Algae produce oxygen as a by-product of photosynthesis during the day, and not at night, so oxygen runs out by the end of the night; fish are not linked to the low oxygen.
• B)Fish consume oxygen during the night, and oxygen starts to run out by dawn; algae are not linked to the low oxygen.
• C)Algae produce oxygen as a by-product of photosynthesis during the day, but not at night, so oxygen runs out by the end of the night; in addition, fish continue to consume oxygen during the night, which further reduces the oxygen by the end of the night.
• D)Neither fish nor algae or linked to the low oxygen found at the end of the night.

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