Environment

1 question

• 2025 · Question 40 · Ecosystems

  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?

  Choose your answer

  (a)I and II(b)II only(c)I and III(d)None of the above statements is correct

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  Source: UPSC, Civil Services (Preliminary), General Studies Paper I (opens in a new tab)