What is a plant hormone? Name four plant hormones. State one function of each.
The chemicals that perform the function of control and coordination in plants are called plant hormones.
The four plant hormones and their functions are as follows:
1) Auxin: It promotes cell enlargement and cell differentiation in plants.
2) Gibberelins: It breaks the dormancy in seeds and buds.
3) Cytokinins: It promotes cell division in plants.
4) Abscisic acid: It promotes closing of stomata.