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