Plant Hormones
Biology ⇒ Plant Biology
Plant Hormones starts at 9 and continues till grade 12.
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See sample questions for grade 9
Describe how auxins are involved in phototropism.
Describe how cytokinins and auxins interact to control organ formation in plant tissue culture.
Describe one agricultural use of auxins.
Describe the effect of gibberellins on dwarf plants.
Explain how abscisic acid helps plants survive drought conditions.
Explain the difference between plant hormones and animal hormones.
Explain the role of ethylene in fruit ripening.
Name two functions of gibberellins in plants.
A plant is exposed to drought conditions. Which hormone is likely to increase in concentration, and what effect does this have on the plant's stomata?
A scientist applies a high concentration of auxin to one side of a horizontally placed stem. Predict and explain the direction in which the stem will bend.
Describe how the balance between auxin and cytokinin concentrations can determine whether roots or shoots develop in plant tissue culture.
Explain why applying gibberellins to a plant might be useful in commercial agriculture, especially for fruit production.
Which plant hormone is primarily responsible for delaying leaf senescence, and how does this benefit the plant?
