Plant Hormones MCQs

Which of these functions is controlled by hormones?

ripening of fruit
the growth of shoots upward and roots downward
the growth of plants toward the light
the dropping of leaves in the fall
All of these

Correct Answer

All of these

_ stimulate the elongation of cells in the plant stem and phototropism

Auxins
Abscisic acid
Cytokinins
Gibberellins

Correct Answer

Auxins

_ promote both cell division and cell elongation

Auxins
Abscisic acid
Cytokinins
Gibberellins

Correct Answer

Gibberellins

_ Causes shoots to elongate so plants can grow taller and leaves can grow bigger

Auxins
Gibberellins
Abscisic acid
Cytokinins

Correct Answer

Gibberellins

_ signal buds and seeds to begin growing in the spring

Auxins
Gibberellins
Abscisic acid
Cytokinins

Correct Answer

Gibberellins

_ stimulate cell division, promote leaf expansion, and slow down the aging of leaves

Auxins
Gibberellins
Abscisic acid
Cytokinins

Correct Answer

Cytokinins

Function of cytokinins is _

stimulate cell division
promote leaf expansion
slow down the aging of leaves
All of these

Correct Answer

All of these

_ inhibits cell growth and can help prevent water loss by triggering stomates to close

Auxins
Gibberellins
Abscisic acid
Cytokinins

Correct Answer

Abscisic acid

Plant nurseries use _ to keep plants dormant during shipping

Auxins
Gibberellins
Abscisic acid
Cytokinins

Correct Answer

_ stimulates the ripening of fruit and signals deciduous trees to drop their leaves in the fall

Auxins
ethylene
Gibberellins
Abscisic acid

Correct Answer

ethylene

Fruit growers use _ to partially ripen fruit for sale

Auxins
ethylene
Gibberellins
Abscisic acid

Correct Answer

ethylene

Florists actually use _ to help make cut flowers last longer

Cytokinins
ethylene
Gibberellins
Abscisic acid

Correct Answer

Cytokinins