MCQs Botany-29 Posted on April 3, 2025August 30, 2025Author agropublishers 0 1. Which phytohormone is primarily responsible for inducing seed dormancy and inhibiting germination under unfavorable conditions? Cytokinin Gibberellin Abscisic acid Ethylene 2. Which of the following describes a symbiotic association between the hyphae of a fungus and the roots of a plant? Actinomycetes Parasite Bryophyte Mycorrhizae 3. Which phytohormone plays the most significant role in regulating plant height by promoting stem elongation? Abscisic acid Cytokinin Gibberellin Ethylene 4. Which of the following is NOT typically represented on a climograph? Seasonal climate trends Monthly precipitation totals Wind speed patterns Monthly temperature averages 5. Photonasty is a ———- plant movement that occurs in response to light intensity Non-directional Directional None of these 6. Manchester is known for ___________ due to its historical dominance in the textile industry during the Industrial Revolution Polyester Textile Silk Textile Cotton Textile Woollen Textile 7. _____________ play a crucial role in the nitrogen cycle by oxidizing ammonia (NH4+) to nitrite (NO2-) Nitrobacter Azotobacter Nitrosomonas Rhizobium 8. Select the correct counterpart that has the same relation with the given word: Mountain : Hill :: Tree : __________? Forest Shrub Leaf Ecosystem 9. Based on morphological and molecular evidence, which of these dicotyledonous families is considered the most evolutionarily advanced? Acanthaceae Scrophulariaceae Asteraceae (Compositae) Apiaceae (Umbelliferae) 10. Phytohormone _________ is involved in the induction of “triple response” (reduced elongation, thickened stem, exaggerated curvature) Ethylene Jasmonic acid Brassinosteroids Auxin Loading …