Plant cells communicate throughout the growth and eventual senescence of a plant. Shoot apical meristems are the primary site of production. If the apical shoot of this plant is removed, signals will be sent to the lateral meristems and lateral shoot growth will ensue.

Shoot apical meristems are the source of all above-ground organs, such as leaves and flowers.

Explanation:

Shoot apical meristems are the source of all above-ground organs, such as leaves and flowers. Cells at the shoot apical meristem summit serve as stem cells to the surrounding peripheral region, where they proliferate rapidly and are incorporated into differentiating leaf or flower primordia.