Biogeochemical Cycles & Earth Systems — PYQ Quiz

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Environment & Ecology → Biogeochemical Cycles & Earth Systems

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UPSC 2025Biogeochemical Cycles & Earth Systems

With reference to the planet Earth, consider the following statements: I. Rain forests produce more oxygen than that produced by oceans. II. Marine phytoplankton and photosynthetic bacteria produce about 50% of world’s oxygen. III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air. Which of the statements given above is/are correct?

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