Organic compound synthesized in one part of a plant and translocated to another part where, in very low concentrations, it causes a physiological response.

The only plant hormone that is a gas

A hormone manufactured primarily in the shoot tips, in embryos, and in parts of developing flowers and seeds.

A hormone that stimulates stem elongation

Which of the following shows the correct relationship between a hormone and its function?

It is a leaf movement or orientation following the direction of the sun’s ray.

Nastic movement resulting from contact or mechanical disturbances such as shaking

Growth of plant part toward the stimulus

Growth away from gravity