MCQs Botany-31 Posted on July 20, 2025August 30, 2025Author agropublishers 0 1. Which device detects chlorophyll content in leaves? SPAD Calorimeter pH meter Anemometer 2. Which of the following is the widely accepted physiological role of gibberellins in plants? Induction of leaf abscission Maintenance of seed dormancy Stimulation of root hair formation Promotion of stem elongation 3. Abscisic acid (ABA) plays a crucial role in ____________ Cell wall loosening Promoting fruit ripening Phototropism Stomatal closure under drought 4. Which device is commonly used for collecting soil samples from the field? Soil moisture meter Soil auger None of these Penetrometer 5. In botanical gardens, pheromone traps are primarily used to _____________ Monitor insect populations Directly kill all insects Repel beneficial insects Enhance soil fertility 6. Cytokinins are synthesized mainly in the___________ Mature leaves Root tip Flower petals Woody stems 7. The biologically active form of phytochrome (Pfr) is primarily stabilized under___________ light condition Blue light UV light Red light Far-red light 8. ________________ plants are specifically adapted and thrive in sandy environments None of these Halophyte Psammophilous Xerophytic 9. Which of the following represents a fundamental developmental difference between plants and animals? Plants maintain totipotency in somatic cells throughout their lifespan Plants lack level of cellular organization None of these Plants have very slow growth processes 10. Which of the following insects is NOT herbivorous? None of these Thrips Armyworm Whiteflies Loading … Question 1 of 10
