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