Q1. Which plant hormone accelerates the abscission of leaves and fruits?A. AuxinB. GibberellinC. Abscisic acidD. Ethylene
Q2. Which plant hormone increases sugar yield in sugarcane by promoting stem elongation?A. AuxinB. GibberellinC. CytokininD. Abscisic acid
Q3. Which plant growth regulator is referred to as the 'stress hormone'?A. CytokininB. Abscisic acidC. AuxinD. Gibberellin
Q4. Select the incorrect statement regarding senescence and abscission:A. Senescence involves the breakdown of cellular components.B. Ethylene accelerates leaf abscission.C. Cytokinins promote leaf abscission.D. Senescence is a form of programmed cell death.
Q5. Which type of growth occurs due to the activity of intercalary meristem?A. Primary growthB. Secondary growthC. Apical growthD. Lateral growth
Q6. Which phase of growth is represented by a plateau in the sigmoid growth curve?A. Lag phaseB. Log phaseC. Stationary phaseD. Exponential phase
Q7. Which type of cell division produces new cells in the root apical meristem?A. MeiosisB. MitosisC. Binary fissionD. Budding
Q8. Which phase of growth shows the highest increase in protoplasm content?A. Maturation phaseB. Elongation phaseC. Meristematic phaseD. Senescent phase
Q9. Which plant growth regulator was discovered through experiments on tobacco stem callus proliferation?A. AuxinB. GibberellinC. CytokininD. Abscisic acid
Q10. Which type of heterophylly occurs in cotton where juvenile and mature leaves differ in shape?A. Habitual heterophyllyB. Environmental heterophyllyC. Developmental heterophyllyD. Physiological heterophylly