Question

5. Nearly 80 per cent of oxygen in water is released from
1. fungi
2. algae
3. protozoa
4. virus
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Answer 1

Nearly 80 per cent of oxygen in water is released from plankton

Answer 2

Explanation:

Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize.