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