Which of the following is a unique event that provides the basis for life on this planet?

  • A
    $N_2$ fixation
  • B
    Photosynthesis
  • C
    Protein synthesis
  • D
    Respiration

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What is the effect of high $CO_{2}$ concentration and higher values of $ATP/ADP$ ratio?

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Approximately $9/10$ $(85-90\%)$ of the total photosynthesis on Earth is carried out by:

Which of the following fixes $CO_2$ in carbohydrates?

Assertion : Dark reaction occurs only at night in the stroma of chloroplast.
Reason : $CO_2$ fixation occurs only during $C_3$ cycle.

Who proposed the theory of photosynthesis in guard cells?

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