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