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In photosynthesis,

  • (a) O2 is taken in and CO2 is released Your answer
  • (b) CO2 is taken in and O2 is released Correct
  • (c) O2 is taken in and no CO2 is released Your answer
  • (d) CO2 is taken in and NO2 is released Your answer
Your answer: Correct answer: (b)
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Explanation

Why (b) is correct

In photosynthesis, CO2 is taken in and O2 is released.

Why the other options are wrong

  • (a) · your answer Taking in O2 and releasing CO2 describes respiration.
  • (c) · your answer O2 is released, not taken in.
  • (d) · your answer No NO2 is released in photosynthesis.
NCERT point: Gas exchange in photosynthesis is the reverse of that in respiration.
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