Question
Biology Question on Plant Growth Regulators
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. What significance is this experiment of?
A
It is the basis for quantitative determination of small amounts of growthpromoting substances.
B
It supports the hypothesis that IAA is auxin
C
It demonstrated polar movement of auxins.
D
It made possible the isolation and exact identification of auxin.
Answer
It demonstrated polar movement of auxins.
Explanation
Solution
The correct option (C): It demonstrated polar movement of auxins.