growth regulators on a plant. One group received a cyitalinin-rich solution, and another recetved an aucin-rich solution, Affer a week, they found that cytokinintreated plants had longer stems, while awxin-treated plants had increased root growh.
Auxin is a plant hormone that plays a key role in (a) ____________ and root formation.
Cytokinin is another plant hormone that promotes (b) ____________ Auxin is offen used in agriculture to promote (c) ____________ in cutting propagation.