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    • Question

      Which of the following element is non-essential but

      useful for plants?
      A Magnesium Correct Answer Incorrect Answer
      B Sodium Correct Answer Incorrect Answer
      C Chlorine Correct Answer Incorrect Answer
      D Copper Correct Answer Incorrect Answer

      Solution

      Accumulation of Na⁺  at high concentrations in the cytoplasm results in deleterious effects on cell metabolism, e.g., on photosynthetic activity in plants.

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