- 1- Scientific Thinking: A series of experiments by several scientists led to the discovery of a plant hormone
- 2- Botanists have identified several major types of hormones
- 3- Auxin stimulates the elongation of cells in young shoots
- 4- Cytokinins stimulate cell division
- 5- Gibberellins affect stem elongation and have numerous other effects
- 6- Abscisic acid inhibits many plant processes
- 7- Ethylene triggers fruit ripening and other aging processes
- 8- Connection: Plant hormones have many agricultural uses