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Dr F went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?

  • It made possible the isolation and exact identification of auxin

  • It is the basis for quantitative determination of small amounts of growth - promoting substances

  • It supports the hypothesis that IAA is auxin

  • It demonstrated polar movement of auxins

Answer

B.

It is the basis for quantitative determination of small amounts of growth - promoting substances

Dr. F went isolated auxin from Avena coleoptile tip. His experiment demonstrated the polar movement of auxins.

Dr. F went isolated auxin from Avena coleoptile tip. His experiment demonstrated the polar movement of auxins.