Indole propionic acid is a:

What happens when auxin is applied to the tip of a cut stump?

The movement of auxin is largely

How does pruning help in making the hedge dense?

Dr. $F$. Went removed the coleoptile tips and placed them in agar for one hour. The agar block then caused curvature in decapitated coleoptiles. What does this experiment demonstrate?

Which of the following plant hormones prevents the premature falling of fruits?