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      Question

      Based on his studies, who among the following showed

      that sunlight is essential to the plant process that somehow purifies the air fouled by burning candles or breathing animals?
      A Antonie Philips van Leeuwenhoek Correct Answer Incorrect Answer
      B Selman Abraham Waksman Correct Answer Incorrect Answer
      C Rudolph A Marcus Correct Answer Incorrect Answer
      D Jan Ingenhousz Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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