For ten points, identify these plant hormones primarily responsible for promoting senescence and stem elongation.
Related Tossup/Bonus      These chemicals are synthesized ent-kaurene, and all of them are diterpenoid acids. These chemicals work when Calcium two plus activates a protein, calmodulin, which binds to the DNA, causing these chemical's function. GA1 and GA3 are two examples of these chemicals. These chemicals were first observed by a scientist studying "foolish seedling" disease, and that scientist's name was Eiichi Kurosawa. For ten points, identify these plant hormones primarily responsible for promoting senescence and stem elongation.
Related Tossup/Bonus      These chemicals are synthesized ent-kaurene, and all of them are diterpenoid acids.
{Gibberellin}{s}