Q1. Which phase of the sigmoid growth curve represents rapid cell division and elongation?A. Lag phaseB. Log phaseC. Stationary phaseD. Decline phase
Q2. What is the term for leaves of different shapes found in the same plant due to environmental factors?A. Genetic plasticityB. Developmental plasticityC. Environmental heterophyllyD. Habitual heterophylly
Q3. Select the correct statement regarding the phases of plant growth:A. The meristematic phase has fully matured cells.B. The elongation phase increases cell size.C. The maturation phase occurs before the elongation phase.D. The log phase represents slow growth.
Q4. Select the correct statement about plant hormones:A. Cytokinins inhibit cell division.B. Abscisic acid promotes seed dormancy.C. Gibberellins suppress bolting in rosette plants.D. Ethylene delays fruit ripening.
Q5. Which of the following about seed germination is incorrect?A. Gibberellins promote enzyme production for germination.B. Abscisic acid promotes seed germination.C. Oxygen is required for seed germination.D. Water uptake is essential for germination.
Q6. Which plant growth regulator delays senescence and is commonly used in plant tissue culture to promote shoot growth?A. GibberellinB. AuxinC. CytokininD. Abscisic acid
Q7. Select the correct statement regarding abscisic acid (ABA):A. ABA promotes seed germination.B. ABA induces stomatal closure during drought.C. ABA delays seed dormancy.D. ABA promotes cell division.
Q8. Which plant growth regulator is known to promote bolting in rosette plants?A. AuxinB. GibberellinC. CytokininD. Ethylene
Q9. Which growth pattern in plants results in a linear curve when plotted against time?A. Geometric growthB. Arithmetic growthC. Sigmoid growthD. Exponential growth
Q10. Which plant hormone induces apical hook formation in dicot seedlings?A. AuxinB. GibberellinC. CytokininD. Ethylene