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ARC-Challenge / LEAP_2007_8_10418 / Students want to compare the size of microorganism communities in 500-milliliter…

Problem

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question

Students want to compare the size of microorganism communities in 500-milliliter water samples from each of two ponds. Which factor most likely will affect the accuracy of their observations?

choices

  • the average temperature of the water samples
  • the brand of microscope slide used
  • the magnifying power of the microscope
  • the proper identification of each microorganism

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