50 Most Important NEET PYQs of Chapter 15: Plant Growth and Development – Part 1 (Q1–25)
ðŠī 50 Most Important NEET PYQs of Chapter 15: Plant Growth and Development – Part 1 (Q1–25) ð By neetpyqall | biologyatease1.blogspot.com 1. Which one is a growth inhibitor? A) IAA B) GA C) ABA D) Kinetin ✅ Answer: C) ABA ð§ Explanation: Abscisic acid (ABA) is known as a growth inhibitor because it promotes dormancy and abscission, and inhibits seed germination. 2. Gibberellins cause: A) Inhibition of cell division B) Cell elongation C) Stomatal closure D) Leaf fall ✅ Answer: B) Cell elongation ð§ Explanation: Gibberellins promote stem elongation and leaf expansion by stimulating cell elongation and breaking seed dormancy. 3. The function of cytokinins is: A) Inhibiting cell division B) Promoting root growth C) Promoting cell division D) Promoting abscission ✅ Answer: C) Promoting cell division ð§ Explanation: Cytokinins promote cytokinesis (cell division), especially in actively growing tissues. 4. Which hormone delays leaf senescence? A) ABA ...