Plant Hormones and Their Commercial Uses

Which plant hormone is used to stimulate root growth in cuttings?

• Gibberellin

• Ethylene

• Auxin

• Cytokinin

How does auxin act as a selective weed killer?

• By blocking nutrient uptake

• By inhibiting photosynthesis

• By targeting broad-leaved plants

• By enhancing water absorption

What is one of the main uses of gibberellin in agriculture?

• To increase root length

• To reduce plant height

• To enhance leaf color

• To control dormancy

Why is ethylene important in the fruit industry?

• It enhances fruit color

• It increases fruit size

• It prevents fruit from ripening

• It controls the ripening process

How does ethylene affect fruit at the cellular level?

• It increases chlorophyll production

• It stimulates an enzyme that causes ripening

• It enhances water retention

• It reduces sugar content