Plant Hormones
Biology ⇒ Plant Biology
Plant Hormones starts at 9 and continues till grade 12.
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See sample questions for grade 11
A scientist applies a high concentration of auxin to the lower side of a horizontally placed stem. What is the expected response?
Describe how auxins cause phototropism in plants.
Describe the effect of gibberellins on dwarf and tall pea plants.
Describe the role of abscisic acid in seed dormancy.
Describe the role of ethylene in fruit ripening.
Explain how abscisic acid helps plants survive drought conditions.
Explain the antagonistic relationship between auxins and cytokinins in plant tissue culture.
A scientist applies a high concentration of auxin to the lower side of a horizontally placed stem. What is the expected response?
Auxins are mainly produced in which part of the plant? (1) Roots (2) Leaves (3) Shoot apical meristem (4) Flowers
Which hormone is most likely to accumulate in a plant experiencing drought stress? (1) Gibberellin (2) Cytokinin (3) Abscisic acid (4) Ethylene
Which hormone is most likely to be found in high concentrations in a mature, yellowing leaf? (1) Cytokinin (2) Gibberellin (3) Abscisic acid (4) Auxin
Which of the following hormones is most closely associated with phototropism? (1) Gibberellin (2) Auxin (3) Cytokinin (4) Abscisic acid
Fill in the blank: __________ is the hormone that promotes lateral bud growth when apical dominance is removed.
Fill in the blank: __________ is the only plant hormone that exists as a gas under normal conditions.
Fill in the blank: Cytokinins are mainly synthesized in the __________ of plants.
Fill in the blank: The hormone __________ is commonly used to induce parthenocarpy (seedless fruit formation) in plants.
True or False: All plant hormones are transported only through the phloem.
True or False: Cytokinins are involved in the regulation of nutrient mobilization in plants.
True or False: Cytokinins promote root growth more than shoot growth.
True or False: Ethylene is a gaseous plant hormone involved in fruit ripening.
