IMMUNOLOGY

Detailed explanation-1: -They are derivatives of indole (auxins), terpenes (Gibberellins), adenine (Cytokinins), carotenoids (Abscisic acid), and gases (Ethylene). In many plants, hormones stimulate seeds to germinate one of the most important ones are Gibberellins, ethylene, and cytokinin. These three hormones break seed dormancy in plants.

Detailed explanation-2: -Gibberellins cause seed germination by breaking the seed’s dormancy and acting as a chemical messenger. Its hormone binds to a receptor, and calcium activates the protein calmodulin, and the complex binds to DNA, producing an enzyme to stimulate growth in the embryo.