Experiment: Two identical aquariums with fish were set up. One had aquatic plants, the other didn't. Oxygen levels were tested over 24 hours.Observation: Oxygen remained higher in the plant tank, especially during the day.Question: What does this suggest?
Correct answer: A. Aquatic plants release oxygen via photosynthesis.
- A. Aquatic plants release oxygen via photosynthesis.
- B. Fish produce more oxygen in isolation.
- C. Water itself creates oxygen.
- D. Plants consume all available oxygen.
Explanation
The correct answer is that aquatic plants release oxygen via photosynthesis. In the experiment, the aquarium with aquatic plants showed higher oxygen levels, especially during the day, indicating that the plants were releasing oxygen. The other options are incorrect, as fish do not produce oxygen, water itself does not create oxygen, and plants do not consume all available oxygen.
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