A widely used plant growth regulator in agriculture is known to increase the yield of cucumbers by promoting the formation of female flowers. How many of the following physiological effects are caused by the same plant growth regulator? (A) Initiates germination in peanut seeds. (B) Induces parthenocarpy in tomatoes. (C) Promotes rapid internode or petiole elongation in deep water rice plants. (D) Helps overcome apic

Step-by-step solution

The plant growth regulator that promotes female flowers in cucumbers is ethylene. Evaluating the given statements for ethylene: (A) Ethylene breaks seed and bud dormancy, and initiates germination in peanut seeds. (Correct) (B) Auxins induce parthenocarpy in tomatoes, not ethylene. (Incorrect) (C) Ethylene promotes rapid internode or petiole elongation in deep water rice plants. (Correct) (D) Cytokinins help overcome apical dominance, not ethylene. (Incorrect) (E) Ethylene promotes root growth and root hair formati