Which of the following promotes growth in plants?

Correct answer: B. Calvin cycle

  • A. Photorespiration
  • B. Calvin cycle
  • C. Both of these
  • D. None of these

Explanation

The Calvin cycle fixes carbon dioxide into organic compounds that can be used to form sugars and other substances needed for plant growth. Photorespiration consumes energy and reduces photosynthetic efficiency, so it does not promote growth. The likely mistake is choosing both because both processes occur in photosynthetic tissues, although their effects are opposite.

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