MCQs Botany-26 Posted on March 4, 2025August 30, 2025Author agropublishers 0 1. The plant hormone ——— is primarily responsible for phototropism Ethylene Cytokinin Gibberellin Auxin 2. The Commelinaceae family is commonly known as the ——— Spiderwort family Bromeliad family Aloe family Orchid family 3. Terpenoids are a major component of ———- plants and are used in their chemotaxonomy Coffee Tea Rose Citrus 4. Taxonomically, mosses are included in which group of plants? Bryophytes Pteridophytes None of these Gymnosperms 5. Photonasty is a type of nastic movement that involves the opening or closing of plant organs in response to———– Light intensity Mechanical stimuli Temperature fluctuations Gravitational forces 6. Lenticels are involved in———– Food storage Gas exchange Mechanical support Water absorption 7. What is the role of statoliths in gravitropism? To perceive mechanical stimuli To perceive water availability To perceive light intensity To perceive gravitational force 8. —- is mong the techniques used to study gene expression in plants ELISA (Enzyme-Linked Immunosorbent Assay) RT-PCR (Reverse Transcription PCR) Microscopy Serology 9. ——- is a cultural method for plant disease control Use of resistant varieties Application of fungicides Biological control Crop rotation 10. Which group of plants produces seeds but does not have flowers or fruits? Gymnosperms Mosses Bryophytes Pteridophytes Loading …
