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Which of the following is NOT a significance of photosynthesis?

  • (a) It produces food for consumers. Your answer
  • (b) It provides O2 for the ozone layer. Your answer
  • (c) It provides O2 for respiration. Your answer
  • (d) It increases the greenhouse effect. Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

Photosynthesis removes CO2 from the air, so it reduces, not increases, the greenhouse effect. The other options are real benefits of photosynthesis.

Why the other options are wrong

  • (a) · your answer True: photosynthesis is the source of food for all consumers.
  • (b) · your answer True: O2 released by photosynthesis is the source of the ozone layer.
  • (c) · your answer True: it supplies the O2 used in aerobic respiration.
NCERT point: Photosynthesis is the primary source of food and oxygen on earth.
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