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