Q1. Which plant hormone was first identified from human urine?A. GibberellinB. CytokininC. AuxinD. Ethylene
Q2. Which plant hormone was discovered by observing the effect of a volatile substance from ripened oranges on bananas?A. AuxinB. CytokininC. EthyleneD. Gibberellin
Q3. What is the term for the capacity of plant cells to regenerate a whole plant?A. DifferentiationB. DedifferentiationC. TotipotencyD. Redifferentiation
Q4. Which plant hormone is used to promote root formation in stem cuttings?A. GibberellinB. AuxinC. CytokininD. Abscisic acid
Q5. Who demonstrated that the tip of the coleoptile is the site of auxin production?A. Charles DarwinB. E. KurosawaC. F.W. WentD. H.H. Cousins
Q6. Select the correct statement regarding abscisic acid (ABA):A. ABA promotes seed germination.B. ABA induces stomatal opening.C. ABA promotes seed dormancy.D. ABA delays leaf senescence.
Q7. Select the incorrect statement regarding phases of growth:A. The meristematic phase shows active cell division.B. The elongation phase increases cell size.C. The maturation phase occurs before the elongation phase.D. The log phase represents rapid growth in a sigmoid curve.
Q8. Which plant growth regulator promotes cell division and is naturally found in coconut milk?A. AuxinB. CytokininC. GibberellinD. Ethylene
Q9. Which plant growth regulator is used to delay the ripening of fruits during storage?A. Abscisic acidB. AuxinC. CytokininD. Gibberellin
Q10. Which plant growth regulator is involved in the formation of parthenocarpic fruits?A. AuxinB. CytokininC. GibberellinD. Ethylene