If the growing coleoptile tip is cut,what happens to phototropism?

The direction of the transport of auxins is

What is apical dominance?

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

In most of the higher plants,the growing $A$ bud inhibits the growth of $B$ bud,a phenomenon called apical dominance. Removal of the shoot tips usually results in growth of $C$ buds.

Auxin originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely