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360Science™: Environmental Effects on Mitosis


In this lab, students carry out an investigation on how the addition of the auxin indole-3-acetic acid, IAA, impacts the rate of mitosis in an onion plant root. They will get the opportunity to compare onion roots grown with and without this additional IAA hormone.


  • Biotic and abiotic factors
  • Cell cycle
  • Plant hormones
  • Chi-square analysis